Adrian Chase

"I've studied you, Oliver Queen. I know everything, who you love, who you trust, who you've hurt. But do you know how easy it was to turn Evelyn against you? How easy it will be to turn them all? You're not a hero. You're a killer. And I'm going to show you that. I'm going to show you how everything you touch dies."

- Adrian to the Green Arrow

Adrian Chase (born c.2359 as Simon Morrison) is a male Human who lives in the 24th century who is the District Attorney of Star City and a close collaborator/friend of Oliver Queen as mayor, helping him in cleaning up the streets through the legal system. He is also secretly the villainous vigilante who calls himself Prometheus, and appears to not only know that Oliver Queen is the Green Arrow, but has a personal vendetta against him as well. Having lost someone four years ago at the hands of The Hood, Adrian demanded retribution, and spent his time afterwards studying The Hood's skillset and history, while also uncovering Oliver's true identity as the Green Arrow. In his alter-ego, Prometheus crusades against the Green Arrow in order to destroy the hero's life and legacy. He has also been labeled by the media as the "Throwing Star Killer" for murdering people with shurikens made from Oliver's discarded arrows, whose names formed anagrams of people on the List as a form of twisted message to Oliver.

Early life
Simon was born to Justin Claybourne and an unnamed woman with the surname Morrison who would later rename herself Amanda Westfield sometime around 2359. In 2370 Simon met Oliver Queen when he successfully tried to pick up his girlfriend.

In 2378 Simon's father was murdered by the Hood, and so he sought vengeance upon the elusive vigilante. Dropping off the grid completely and erasing all traces of his existence from the internet, Simon changed his name to "Adrian Chase" and began researching his target, learning everything he could about him. In his research, Adrian discovered the identity of his target as Oliver Queen and obsessively studied him for 3 years, learning everything he could about him and his allies. He also became aware of the existence of The List, a book of Starling City individuals with ties to Malcolm Merlyn, which included his father. Being aware of Oliver's identity also made Adrian one of the only non-Team Arrow members to be aware of Roy Harper's deception when he faked his death to exonerate Oliver when his identity was exposed.

In 2381 after learning everything he could about Oliver, Adrian sought out Oliver's former mentor Talia al Ghul, who was now equally vengeful towards Oliver as he had recently killed her father Ra's al Ghul and taught him the ways of the League of Assassins. After acquiring the skills needed, Adrian also armed himself with an array of weapons forged from The Hood's discarded arrows kept in the Star City SCIS Department evidence lockup. Adrian also began using a suit strikingly similar to Oliver's suit from his days as the Hood, but with darker colors and with a full face mask, adopting the name "Prometheus" for his future crusade. Returning to Star City, Adrian became a lawyer to give him better access to government information to aid in his crusade. At some point he met a woman named Doris, who later became his wife.

Somehow, Adrian also became aware of the existence of time travel and the multiverse and even knew about Team Flash's pipeline prison, indicating that he has kept tabs on Barry Allen/The Flash as well. He was also somehow aware of the Legends and the 26th century timeship, the Waverider.

Sometime after Susanna's death, Adrian succeeded her as the district attorney of Star City. Adrian was building a case against Derek Sampson with the intent of flipping the drug dealer so he'd give up the names of his suppliers.

Beginning his crusade
Five months following Damien Darhk's death, Prometheus began his crusade by targeting individuals in Star City whose names formed anagrams to other names on The List. His first target was Lieutenant Conahan. When Conahan was leaving the SCIS precinct, he noticed Prometheus on the rooftop. Mistaking him for Green Arrow, Conahan asked if he could help him, but was shot by an arrow. Conahan painfully tried to shoot back, but Prometheus dodged his shots, leaped to the ground and threw a shuriken to disarm him. As Conahan tried to flee, Prometheus threw a knife into his leg, knocking the SCIS officer down. As Conahan desperately tried to crawl away, Prometheus slowly walked up to him, sword in hand, and, when asked if he was Green Arrow, coldly replied that he wasn't and killed him.

Conflict with Tobias Church and finally meeting Oliver Queen
A few nights later, Prometheus learned of Green Arrow's encounter with crime lord Tobias Church amidst his illegal deal with AmerTek Industries, where he almost killed Green Arrow. In response, Prometheus stalked Church and as he left Club XLR8, and killed his two bodyguards. While Church mistook him for the Green Arrow, Prometheus threw an axe into Church's shoulder, leaped to the ground and slammed Church into the pavement. Prometheus angrily told Church he was aware of his attempt to kill the Green Arrow, and warned Church that the former was his to kill and if he ever tried to do it again, then he'd die as well.

After learning that a hockey-masked vigilante "killed" Derek Sampson, Adrian went to confront Oliver about it (officially becoming acquainted with him) and told him about what happened to Sampson. After Sampson turned out to be alive, Adrian asked for Oliver to get Judge Pittson to allow Adrian to obtain a warrant to search his known hideouts. After he agreed, Adrian told Oliver about the first time they met when Oliver picked up his girlfriend, though Adrian jokingly reassured him, saying, "It's okay, I don't hold grudges". Later, Green Arrow and his new team apprehended Sampson which pleased Adrian as he informed Oliver and Thea of this.

A few days later, during a meeting at the mayor's office, Adrian met the new deputy mayor Quentin Lance and said it would be his pleasure to work with him. Adrian pointed out that he doesn't blame Quentin for working with Darhk as public service wasn't easy and that, sometimes, getting a little dirty was inevitable in order to clean it up. When Team Arrow apprehended Sergio Espinoza, an associate of Tobias Church, and stole a package from Palmer Technologies, Adrian and Quentin personally delivered it to the SCIS evidence locker. The evidence instead turned out to be a disguised bomb, causing an explosion that allowed Church and his men to infiltrate and steal weapons from the evidence locker.

Later that night, Adrian interrogated Espinoza at the Anti-Crime Unit headquarters, threatening to beat the information out of him due to Espinoza's refusal to talk. Initially, Espinoza didn't take Adrian's threat seriously due to his position as a district attorney, but Adrian reminded him that justice in Star City is dealt by vigilantes. Before the interrogation could go further, Church and his men attacked the ACU and killed several of the guards all while trapping Adrian and Espinoza inside the building. Suddenly, Ragman appeared and planted a bomb on the wall, and as he absorbed the ensuing explosion, Mr. Terrific, Wild Dog and Artemis emerged from the hole that was created. The team escorted Adrian and the other ACU members out of the building to safety. Later, Adrian informed Quentin and Thea of the incident but hadn't been able to find Wild Dog, who had been kidnapped during the attack. Adrian then told them that he'd re-evaluated his view on vigilantes and started to trust Team Arrow more.

Prometheus confronted Church at the docks over ignoring his warnings about Green Arrow and kidnapping Wild Dog, and while attempting to kill him with an arrow, Church's bodyguard protected him from the attack. Prometheus reminded Church he had his second warning and wouldn't be given a third and left. After Church was arrested following his defeat by Green Arrow, being transferred to Iron Heights, Prometheus attacked the convoy of shuttles escorting him. After slaughtering the escorting officers, he confronted Church in the shuttle. Church tried to plead for his life by telling him Green Arrow's identity: Oliver Queen. When Church asked if they were cool, Prometheus threw a shuriken into his neck and killed him, and replied that they were, then left the scene of his slaughter.

Waring with Team Arrow
With Green Arrow now aware of his existence after being informed by Church prior to his death, Adrian lured him, Red Arrow and Spartan to a construction site, using Church's communicator to lure them out. After they tracked the communicator, Adrian called it, heavily breathing into the phone, as Green Arrow answered. He then ignited a message on the ground, "SO IT BEGINS". From there, Prometheus continued killing civilians to form more anagrams of individuals on the List including Peter Meld and Gay Eked. Their names, along with Conahan and Church's, all spelled out anagrams of Green Arrow's previous victims: Adam Hunt, Ted Gaynor, Palmer Cokes and Sachi Beech. Adrian later went to the crime scene of Gay Eked's murder where he "met" Green Arrow.

Later Susan Williams reported on Prometheus' killings on the news which Adrian told Oliver was a disaster. After Susan dubbed him the "Throwing Star Killer", Adrian admitted to a annoyed Oliver that it had a "certain flare" to it. Finding more six more potential victims after discovering Prometheus' pattern, Team Arrow sent a member to each one. Prometheus went after a train driver but was confronted by Artemis. They entered into a duel where Artemis managed to cut Prometheus' right arm, before Green Arrow came to Artemis' rescue, shooting an arrow into his back. Instantly recognizing it as an explosive arrow, Prometheus threw it onto the roof where it exploded and Prometheus escaped through the hole made, but left a bomb which blew up the train, though Green Arrow and Artemis ultimately escaped with the train driver. Later, Prometheus sneaked into Quentin Lance's apartment and left a cut on his arm, while he was passed out from alcoholism, just like the cut Artemis gave Prometheus, and left a shuriken to implicate him.

Sometime after Prometheus' encounter with Artemis he sought her out, after deducing her identity as Evelyn Sharp. Prometheus manipulated her into betraying Oliver, as Evelyn had become resentful of Oliver after learning he was the Hood, who'd murdered several people she knew, promising to let her watch when he finally killed the Green Arrow. Recruiting Evelyn to his cause allowed Prometheus to learn the identities of every Team Arrow member, as well as information on their personal lives. While trying to find bank robber Eric Dunn before the elusive Vigilante did, Adrian interrogated his arrested associate Laura Buser. However, she simply told him to go to hell to which he gave a cold stare and replied that he'd been to hell, and slammed his hand into her mask to intimidate her, and so she gave up Eric's location. As Adrian told Oliver that Eric was hiding out at Papp Motel and Oliver went to inform the ACU. Prometheus met Artemis alone on a rooftop, where she assured him she wasn't followed and told him that Team Arrow didn't suspect her true allegiance.

At some point in December 2389, Prometheus went to Central City, where he broke into S.T.A.R. Labs without setting off any alarms and freed Laurel Lance/Black Siren, the Earth Two doppelgänger of the Laurel Lance/Black Canary, to impersonate her Earth One counterpart, threatening to kill her if she didn't comply. Reluctantly, Black Siren agreed and, to maintain her cover, Prometheus told her vital information on Earth One Laurel's life. He also informed her of the Waverider and the Legends, so Earth Two Laurel could use the cover story that Sara brought her back and transported her to the present. Team Flash would be unaware of the breakout for almost 3 days.

First encounter with Green Arrow
During Christmas, Prometheus, while sharpening his weapons, was approached by Evelyn with photographs and addresses of Felicity Smoak and Rory Regan. Evelyn then asked Prometheus to be there when he killed Oliver, but Prometheus stated that he didn't intend to kill Oliver, only to make him wish he was dead. Prometheus later attacked Curtis Holt at the mayor's Christmas party and his husband, Paul, effortlessly defeating him and injecting him with the drug, Dycloseral, making Oliver and Team Arrow aware that he knew their secret identities.

At Claybourne Pharmaceuticals, Prometheus confronted Green Arrow and engaged him in a battle. Though Green Arrow initially had the upper hand, Prometheus ultimately bested him - only for Wild Dog to shot his katana out of his hand, causing Artemis to intervene and reveal her true allegiance. As Green Arrow and Wild Dog stood in shock, Artemis fired a smoke arrow to cover her and Prometheus' escape. While investigating Claybourne Pharmaceuticals, Detective Billy Malone discovered a photograph of a baby and sent it to Felicity, leaving Oliver to believe Prometheus was Justin Claybourne's son, before Prometheus appended Billy. Adrian later told Oliver of Billy's abduction and insisted that the ACU have a shoot to kill order placed on Prometheus which Oliver agreed to. Tracking Prometheus to the location of where Oliver killed Claybourne, Green Arrow discovered that Prometheus had recreated the whole scene in which of all the people that he'd killed when pursuing Claybourne before confronting Prometheus in the exact spot in which he killed Claybourne. Prometheus asked if the Green Arrow had even hesitated when he killed him, or he was merely another name on the List.

They engaged in a fight before landing crashing into one of the building's floors, in which Prometheus told Green Arrow that he knows everything about him and is going to show him and everyone else that everything he touches dies. Having dressed Billy Malone in his suit beforehand, Prometheus ultimately orchestrated Green Arrow killing him in order to prove his point, telling him over a wireless speaker attached to Billy that everyone he loved would die. Somehow, Prometheus also imitated Lyla Michaels' voice to trick Diggle into returning to the safe-house his family were staying in, and tipped off the F.B.I. which allowed them to recapture him. After this, Prometheus sent Earth Two Laurel to impersonate her Earth One counterpart, roughly 3 days after breaking her out of S.T.A.R. Labs.

Exonerating John Diggle and working with Black Siren
Eventually Black Siren's cover was blown but as she asked why she couldn't have just killed them, Prometheus furiously tackled her. Choking her throat tight enough to prevent her using her scream power against him, Prometheus reminded her that her freedom and life were contingent on her following his orders. Terrified, Black Siren agreed and fell in line. Adrian was later called to Oliver's office where he informed him of his friend John Diggle who'd been wrongfully imprisoned for illegal arms dealing of a nuclear trigger, as he'd been set up his superior General J.G. Walker, and wanted Adrian to represent him. Adrian was initially skeptical but agreed. Adrian visited John and told him he was representing him but as Walker appeared to transport John into custody, he insisted to Adrian that Walker would simply falsify an excuse to kill him to cover his tracks. Adrian then tried to delay Walker with various regulations but Walker told Adrian he had the attorney general on speed dial, and threatened to have him disbarred unless John was placed in his custody within 24 hours.

Later Black Siren escaped Team Arrow's custody and Prometheus went to meet up with her. Encountering Ragman, he quickly knocked him out before confronting Green Arrow, which lead to another fight between the two. Green Arrow threw a drugged-dart at Prometheus before firing a cable-arrow at him, hoping to restrain and finally capture him. Instead Prometheus shrugged off the drug and reacted quick enough for the cable to wrap around his arm rather than his whole body as intended. Breaking the cables with his sword, Prometheus told the archer he had a tolerance to the drug and they continued their fight. After seeing Felicity being confronted by Black Siren, Prometheus tauntingly told him to choose between him or Felicity, concluding the ordeal by kicking Green Arrow through a wooden wall, to where Black Siren and Felicity were, before escaping as Black Siren was captured again.

To ensure John wasn't placed in prison, Adrian told John to punch him and pretended to try and fight back as his guards restrained him, as Walker saw this happen. Adrian then reminded him that if a prisoner committed an offence against the district attorney within his jurisdiction, he could personally oversee the matter and reminded Walker it "could take a while". This allowed Adrian to delay John's transportation into Walker's custody by one week. Adrian discovered from a friend at the National Security Agency they were investigating Walker including his involvement with the nuke, but Walker's associates made sure the information remained classified and beyond Adrian's reach. Later, Adrian received the NSA's case against Walker from an anonymous source, and after sending it to a judge and a motion to dismiss, he was able to get John released on bail.

Oliver later held a conference to make John's exoneration public and to commend Adrian's actions. Susan Williams hoped to get an exclusive on Billy Malone's death, though Adrian told her he had no comment as he'd told the other reporters. After a gunman attacked City Hall and shot Adrian, he was taken to hospital but recovered quickly, though his wife was concerned about his wellbeing and tried unsuccessfully to convince him to take some more rest instead of come immediately back to work. After discovering the shooter as James Edlund, a man who had lost his family to a mall shooting years before, Adrian discussed people's rights to wield firearms with Oliver. Though skeptical to allow civilians to have easier access to firearms, Oliver eventually agreed with Adrian and after much discussion with councilwoman Pollard adjusted the firearms law, allowing people better protection.

Attacking the Queen administration
After Oliver visited Prometheus' apparent mother Amanda, asking her for the name of her son, Adrian sent a letter to SCIS Captain Frank Pike containing the autopsy report for Detective Malone's true cause of death. As a result, Pike ordered the Anti-Crime Unit to arrest Green Arrow for Billy's death. Adrian was later present when Oliver and Quentin tried to convince Pike that the Green Arrow was innocent, though he initially refused to listen as he'd still killed a member of ACU. Despite this, Oliver was successful in getting Pike to stop his pursuit after talking sense into him. After this, Adrian leaked the mayor's office's role in covering up Billy's death to the media which was then broadcasted by Channel 52 News, in order to end Oliver's administration as mayor.

Discrediting the Green Arrow and Oliver's discovery of his identity
Adrian offered his letter of resignation in order to take full responsibility for the cover up, but Oliver denied his request and instead insisted that Adrian represent him as his lawyer at the hearing. While Adrian agreed, he reminded Oliver that the circumstances would call for someone to take the fall. At the hearing, Adrian and Oliver watched as the coroner confessed to filing a false report on Billy's death to Councilman Collins, and as Captain Pike told them of Oliver's vouching for the Green Arrow. After the first stage of the hearing, Oliver, Typhuss, Thea, Quentin and Officer Dinah Drake left for the office, though their shuttle was attacked by Vigilante which left them all injured. Adrian gave his reassurances to delay the hearing in light of the attack, while making Oliver accept medical treatment as he'd declined. Adrian confronted Dinah as she'd found a broken piece of Vigilante's visor and offered to take it back to the precinct for her.

Later, Prometheus encountered Vigilante on a rooftop, presumably using the tech from the visor, and warned him that Oliver Queen was his to kill, though Vigilante simply swore to kill him first and both vigilantes came to conflict. A conflict ensured, and Prometheus, clearly being the superior combatant, overpowered Vigilante and forced him off the rooftop, though somehow Vigilante survived and fled. Unmasking, Adrian then called 911 and informed them of a Vigilante sighting. Later Adrian talked to Pike over the various vigilante sightings and if they were simply delaying Star City's inevitable fate, though Adrian reminded him that delaying the inevitable was part of their job. As he kept Pike busy with small talk, he slipped the piece of Vigilante's visor back to Dinah.

At Oliver's office, Adrian offered to take the fall for everything, but Oliver refused to accept this, though Adrian reminded him that someone needed to be discredited or Oliver would lose his job. Instead, Oliver decided to offer up the Green Arrow. Adrian stood by Oliver, Thea, Quentin and Dinah as he gave a speech to the public discrediting Green Arrow with the murder of Billy Malone. Afterwards, Adrian informed Oliver that after his speech Collins has ruled against ending Oliver's administration. Oliver immensely thanked Adrian for this and Adrian reassured Oliver that he didn't do it because he was his boss, but because he was a friend. Later, Adrian confronted Susan and told her he supposedly had an exclusive for her, sickly joking that it was a "matter of life and death".

As a civilian
Simon has appeared to be a kind, caring, selfless, moral individual. He takes his job as an district attorney very seriously, though does have a tendency to lose his temper and is willing to use more extreme methods at achieving justice. After Oliver refused to throw him under the bus for political reasons, Adrian stated that Oliver is not just his boss, but also his friend. However, this was partly a facade to hide his true motives, as he holds a grudge against Oliver Queen for killing his father, Justin Claybourne in cold blood, to the point of vengeance against the latter.

As Prometheus
As Prometheus, Simon is cold, cruel, sadistic, ruthless, unstable, and has an extreme hatred for Oliver Queen for killing his father in cold blood to the point of vengeance against the latter. Simon's fixation on Oliver runs so deep that he will threaten and even kill those who threaten Oliver's life, as he wishes to destroy Oliver himself, as seen with Tobias Church when he made an attempt on Oliver's life. Simon's methods against Oliver are ruthless, merciless, and psychologically personal as he willingly kills innocent people simply because their names are anagrams on Oliver's list, using his victims to recreate the scene in which Oliver killed Justin Claybourne, setting Oliver up to kill Billy Malone who was his ex-fiancée's current boyfriend, and freeing Black Siren to torment him because she is the Doppelgänger of Laurel Lance whom Oliver loved. Adrian's end goal is unclear, however, he has stated to Evelyn Sharp that he wants to make Oliver wish he was dead, and prove to him that everything that he touches dies.

Abilities

 * Expert archer: Like Oliver, Simon is a trained archer although his exact level is unknown due to his preference for throwing weapons. However, he is skilled enough to shoot arrows to either wound or kill his targets and uses it as a improvised quarter-staff like Oliver.
 * Expert swordsman: Simon is trained in the art of swordsmanship, often using his sword fighting skills in conjunction with his melee skills; his exact level as a swordsman is unknown.
 * Free-running/Acrobatics: Simon is able to move and scale down walls with great dexterity and grace, even while throwing his shurikens.
 * Intimidation: Simon possesses an intimidating presences due to his ruthlessness with Tobias Church, Evelyn Sharp, and even Black Siren, a meta-human, showing signs of fear towards him; his killings as the "Throwing Star Killer" combined with media rumors and his presence was enough to cause a city wide panic.
 * Master hand-to-hand combatant/Martial artist: Simon, like Oliver, is an incredible martial artist with his fighting style being similar to Oliver's. Adrian was able to effortlessly defeat Evelyn Sharp and Curtis Holt, and was able to fight on par with Oliver during all three of their confrontations.
 * Master marksman/Knife-thrower: Simon is an incredibly skilled marksman who is highly proficient in throwing weapons such as knives, battle axes, flechettes and his weapon of choice; shuriken. He was able to disarm SCIS Lieutenant Conahan while jumping and was able to perfectly split an arrow shot at him by Oliver in half, by throwing a shuriken.
 * Master tactician/Manipulator/Investigator: Simon has proven himself to be a highly skilled investigator, having learned much about Oliver and all who are close to him. He knows of their secret identities, the List, the S.T.A.R. Labs pipeline, and the Legends. Adrian is also a highly effective tactician, with his tactics against Oliver being at a psychological level, as he was able to successfully trick Oliver into killing detective Billy Malone knowing that Oliver came after Prometheus with the intent to kill him. Adrian is also very manipulative, able to turn Evelyn against Oliver and her fellow Team Arrow members.
 * Peak of human physical condition: Simon is in top physical form after 11 years of training to defeat Oliver. He is strong enough to pin down the large and physically imposing Church and Black Siren with one arm and kick Oliver through a wooden wall with one leg. He also has a high tolerance to drugs, as he was able to quickly shrug off the effect of the Diazepam-ridden dart that Oliver threw at him.
 * Skilled computer hacker: Simon has demonstrated some degree of computer skills, as he has used a theatrical trick during his first confrontation with Oliver and Oliver has mentioned that Simon has erased almost all traces of his identity from the internet.
 * Skilled metalsmith: Simon has stolen several of Oliver's arrows that Oliver has left behind during his vigilante career and melted them down to be reforged as his own weapons; mainly his shuriken.
 * Stealth: Simon is highly skilled in the art of stealth, as he is able to sneak in or appear to people fairly quickly without them noticing. He was able to sneak into S.T.A.R. Labs without triggering any alarms, an act that went unknown to them for 3 days.

Equipment

 * Prometheus suit: Simon wears a protective suit as Prometheus, to hide his identity from his victims, in his quest of vengeance against Oliver Queen.

Behind the scenes

 * In the DC comics, Adrian Chase is known as the crimefighter Vigilante where as in the series they are separate characters.
 * In DC comics, Prometheus is an alias used by multiple villains. However, showrunner Marc Guggenheim has stated that the show's version of the character is not based on any comic character. Nevertheless, this version does resemble the one depicted by Grant Morrison in looks and modus operandi, being a "dark mirror version" of the hero he opposes.
 * He also has similarities to the Batman character Arkham Knight, an alias used by Jason Todd, the second Robin, in Rocksteady's Batman: Arkham Knight video game. Wrongly believing Batman abandoned him after Joker faked his death and tortured him for over a year, Jason swore revenge and adopted darker version of Batman's suit armed with more weapons, with the Arkham Knight alias to kill his former mentor. Adrian suffered a loss at Oliver's hands and uses a darker version of Oliver's suit with even more weapons than he carries as part of his vendetta against him.
 * He also has similarities to Hunter Zolomon/Zoom. Both of them are the darker version of their respective enemies. Black Siren worked with both of them. Both of them help their respective enemies while opposing them in their vigilante personas.