He is a large, multi-coloured, worm-like creature with one small arm.
He is seen rubbing the rail, seemingly comforting a crying Monoe. However, due to fact that he starts rubbing faster in excitement when Madotsuki enters his vision, his true intentions may be left up to speculation.
When entering the door at the end of the Staircase after the first visit, the FACE event takes place.
-KyuuKyuu is thought to be phallic imagery. His location being accessible through a zipper supports this theory.