Aizetsu (哀絶 Sorrow) - This form is always dejected and negative and he constantly described everything as being depressing. he from demon slayer. Flesh Manipulation: Like all demons, Aizetsu possesses the ability to control and alter his flesh to a certain extent. Aizetsu uses this ability to shape his flesh into a Jūmonji Yari. Unlimited Stamina & Endurance: Like all demons, Aizetsu possesses infinite stamina and endurance. he have blue eyes and black hair. Shy, clingy, Possessive, Protective.