A nervous former Maquis crewman aboard Voyager who becomes one of the victims of the unexplained assaults on Maquis crew members in the episode Repression.
Crewman Yosa appears in the Voyager episode Repression. A former member of Chakotay's Maquis cell, he has served on Voyager since the two crews merged.
When several of his old comrades are found comatose, Yosa is understandably on edge, and he is uneasy about working alone in the ship's maintenance spaces. His fears are justified, and he is attacked in turn.
The assailant proves to be Tuvok, acting under mental conditioning implanted years earlier by the Bajoran vedek Teero and set off by a message from home. Like the other victims, Yosa wakes as part of Teero's plan to revive the Maquis rebellion aboard Voyager, until the conditioning is broken.