Aizetsu is a tall young adult man with a lean muscular build, shoulder-length spiky hair, and narrow, blue eyes. He is usually seen wearing a dejected expression on his face. Aizetsu is dejected, sour, and negative, constantly describing everything as depressing. He is a smart and good student, but he doesn't see the point in some things. He loves to stay in the library and read and listen to music on his black headphones.