Esoqq was a violent Chalnoth held captive with Picard by aliens studying how captives respond to leadership.
Esoqq was a Chalnoth, a fierce and anarchic people, who was imprisoned alongside Picard in Allegiance. Picard had been taken from the Enterprise and replaced by a duplicate, and he found himself in a bare cell with Esoqq, the Mizarian philosopher Kova Tholl and the Starfleet cadet Mitena Haro.
Esoqq could not eat the food the cell provided and grew more dangerous as he went hungry, at one point threatening to eat Tholl. Picard kept him in check and organised the group to try to break out. Once the captors were exposed, Esoqq was released. Reiner Schöne played him.