|Kelsi Rose Nielsen|
|Rank:||Lieutenant junior grade|
During her time on New Vulcan, Kelsi helped develop, alongside Spock Prime, a medicine that has been shown to slow, if not altogether stop, the onset of Bendii Syndrome.
Following fellow Ensign Gabriella Montez's rescue of Amanda Grayson, Kelsi was assigned to oversee Grayson's physical examination. Leonard McCoy commented that Kelsi executed "a textbook exam."
Shortly thereafter, Kelsi was chosen to be Enterprise's representative to a pilot program created by Starfleet Medical to test the feasibility of placing counselors on starships. This reassignment was as a result of Kelsi's majoring in psychology at Starfleet Medical Academy.
In addition to her reassignment to become Enterprise's counselor, Kelsi was promoted to Lieutenant junior grade on Stardate 2258.624.
Kelsi was romantically involved with Jason Cross, a Starfleet cadet who was killed on the USS Excelsior during Nero's attack on and destruction of Vulcan. However, following her posting to the Enterprise, Kelsi began a relationship with Ensign Ryan Evans. (A Flight to Remember)
Kelsi was a early proponent for counseling services on Federation starships and died in 2379 at the age of 141. (Team Chipmunk: The Next Generation vs. Star Trek: Omega Force: Beyond the Edge of Forever)