Kesi was a Betazoid officer who served in Starfleet in the late 24th century.
In 2380, Kesi was a science officer on board the USS Titan. Kesi was on the bridge at the Sciences station when Captain Riker ordered a manual ejection of the Warp Core before it was stabilized by Cadet Torvig.
Following this incident, Kesi was at the Comm. while Captain Riker and Commander Tuvok were inspecting Engineering, and he summoned the Captain and Tactical Officer to return to the bridge as the Orishan vessel approached. {Star Trek: Titan novel Sword of Damocles}