Marzena Belview

Mongrelfolk found in S12 Courtyard and found tethered to a post. 
S12d. Tethering Posts Iron rings bolted to these wooden posts were once used to secure horses. Chained to one post is a chaotic neutral mongrelfolk (see appendix D) named Marzena Belview, the older sister of Mishka Belview (see area S12a).
If the characters approach Marzena, read:

The creature chained to the post flaps its leathery wings and takes to the air, but doesn’t get far before its chains go taut. She flutters about madly, screaming nonsense. Marzena Belview is skittish and afraid of everyone and everything except for Clovin Belview (area S17), whom she allows to come close enough to feed her.

Marzena Belview. Marzena stands 4 feet, 5 inches tall and has a hunched posture. Long, stringy black hair hides much of her face, but clearly visible are the spider mandibles and teeth that replace her human mouth. She has the arms and wings of a bat, as well as a cloven hoof in place of her right foot. She doesn’t allow anyone to get close enough to undo her shackles, but if her bonds are magically unlocked or if her chains are somehow broken, she flies away and never returns.
Marzena has the Flight feature (see the mongrelfolk stat block in appendix D). Her madness is embodied in the following statement: “I am convinced that powerful enemies are hunting me, and their agents are everywhere I go. I am sure they’re watching me all the time.”