Monoko is a returning character from the original game. She can be found within the first door of the Nexus, beyond the Henkei Shita eating meat. She resides in a room filled with beds, which Madotsuki must follow her through before cornering her, where she grows extra limbs and slowly chases Madotsuki, causing beds to lift into the air as she does.

Escaping the room with Monoko in it rewards you with the Doomed achievement, which raises questions about her fate.