| Deanna Troi | |
 Commodore Deanna Troi in 2399 | |
| Full name: | Deanna Troi |
| Nickname(s): | Little One, Durango |
| Species: | half-Human, half-Betazoid |
| Gender: | Female |
| Homeworld: | Betazed |
| Born: | March 29, 2336 |
| Affiliation: | Federation Starfleet |
| Family | |
| Mother: | Lwaxana Troi |
| Father: | Ian Andrew Troi (deceased) |
| Sibling(s): | Kestra Troi (sister, deceased) Barin Troi (half-brother) |
| Marital Status: | Married |
| Spouse(s): | William T. Riker (m. 2378) |
| Children: | Ian Andrew Troi II (b. 2365 died later that same year) Natasha Riker-Troi (b. 2381) Thaddeus Troi-Riker (son, deceased) Kestra Troi-Riker |
| Other relatives: | Rene Jacques Robert Francois Picard (son-in-law), 3 grandchildren |
| Career | |
| Previous Assignment: | Counselor, USS Enterprise-D Counselor, USS Enterprise-E Counselor and diplomatic officer, USS Titan |
| Assignment: | Counselor, Starfleet Medical counselling division |
| Rank: | Commodore |
| Insignia: |  
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- "Captain, I'm sensing a – a powerful mind!"
- — Deanna Troi
Deanna Troi is a half-Human, half-Betazoid female Starfleet officer who most famously served on the USS Enterprise-D and the USS Enterprise-E, as counselor and adviser to Captain Jean-Luc Picard.
She would marry and have a child with William T. Riker as well as serve with him on the USS Titan and then on Earth. In 2399, Deanna was promoted to the rank of commodore and was assigned to the Starfleet Medical counselling division as a counselor. (Star Trek: Picard)