A researcher after being locked into a hidden chamber with the Arkveld comes to find, the reason despite the many encounters with the monster it's diaper was in different states and the local palicos didn't interact with it. An old room with ancient arms change the monster in front of them after an ancient mechanism closed the door to the room, forcing a face to face encounter with the monster that only stared as a large hand held it up from the ground and three other smaller hands fitted a new pamp onto it's rear end, tossing it's used into a crystalizing pile on the side of room.