Lweek

Lweek is one of Tweek's sisters found in the Quackenheim Museum. She is in the basement, guarded by a Peacock in the top corner.

How to Rescue
In the first area of the basement, find the ladder. There is a Tweek Telepoint in a corner near a Peacock. Switch to Tweek and glide over to the opposite side, where Lweek waits next to another Peacock.