Headless

True to its name, Headless has no head, instead having what appears to be black smoke where it should be. It wears a light colored long sleeved shirt with dark designs, light colored gloves, dark pants, and light colored shoes. In addition, it wears a necklace with a large circular disk that has designs on it and a large eye at the center.

Headless is shown to be sadistic, telling the unknown assassin that he sent hell to the Regarden Magic Academy teachers and students since it got tiresome killing them on its own, adding a smiley face at the end if its message, and is shown playing with the heads of the two teachers it killed.

Immense Strength: Headless is stated to have twisted off the heads of Bruno and another Regarden teacher and presumably killed the Luminous Naberus, an incredibly dangerous monster that is known for student deaths. In both cases the dead bodies were shown to have stakes made of rock.

Magic

Unknown Magic: Due to being unable to talk, Headless instead writes in the air.