Room

room is an entity (emotion/depression) he is tall and has a triangular head, he is completely black only sometimes his face is white, he is the dark and depressed representation of ouriel (the protagonist) room killed angel and I think some other characters, he is aggressive and causes anxiety to ouriel, room lives in an isolated basement where he sometimes finds himself, room is one of the main characters after he is stabbed by DogTooth in the episode "A_love_leter" but he is still alive yayy well you find him what will you do now?