The Wall

The Wall was part of the "House of Phobias" motive found in chapter 5 of Danganronpa: Killer Murder Mania. It was found in Atsuto Kajikawa's room, and was intended to make him feel fear and pain, but Doyu Suniti took the bullet for him, eventually getting discovered as himself and not Atsuto, and driving him insane, hurting him deeply.

The Wall had messages appearing on it written in blood, originally intended for Atsuto Kajikawa. Doyu Suniti was then discovered to be talking to the wall instead of Atsuto, and the statements became directed towards him. They were mainly centered around Tomoko HIrayama, even going as far as extending a robotic arm into the house, removing his recently replaced heart from his chest, and bouncing it around the room.