Kiros is one of the mercenaries led by Kelsey who board the evacuated Enterprise-D during a baryon sweep to steal trilithium resin from its engines in Starship Mine.
Kiros appears in the sixth-season episode Starship Mine. Posing as part of the maintenance team at the Remmler Array, she is in fact a member of a gang intending to siphon highly unstable trilithium resin from the warp core and sell it as a weapon.
Jean-Luc Picard, who has returned for his saddle, stumbles on the operation and passes himself off as Mot the barber. Kiros is the one who first takes him prisoner, and she remains at Kelsey's side as the gang's numbers dwindle and the lethal baryon field forces them towards Ten Forward.
There she falls victim to one of Picard's improvised traps and is left unconscious as Kelsey escapes alone with the resin.