Corelki is a Bajoran member of the Enterprise-D security staff who joins the away team to the Ohniaka III station in Descent and is killed by the new, individualised Borg.
Corelki appears in Descent, the sixth-season finale. She beams down to the research outpost at Ohniaka III with William Riker, Worf, Data and other security officers to investigate a distress call.
The station's crew are dead, and the team is ambushed by Borg who shout, take cover and fight with a ferocity the Collective has never shown. Corelki is among the first casualties of the attack.
Her death, and that of her colleague Franklin, marks the episode's shock opening, in which the Enterprise learns that the Borg have changed and Data experiences his first emotion in the heat of combat.