Hizack is a member of the crew serving aboard the glass battleship commanded by Cleo, a character who claims to be the heir to a fallen royal family. He is a male adult character with grey eyes and grey hair that is cut to ear length. Hizack is known as a man possessing a vast and diverse array of practical skills. He is notably depicted wearing a distinctive helmet that evokes the image of a legionnaire, adding to his enigmatic and formidable presence.

In the context of the story, Hizack serves as one of Cleo’s trusted crewmates, fighting alongside other members such as Eimer, Nowy, and Barrett. His role extends to operating the ship's cannon, as the use of firearms is rare within the series’ setting, which makes his proficiency with such a weapon a notable asset in combat. His range of secret skills is so extensive that on one occasion he finishes listing them and has to pause to think of more, highlighting his resourcefulness. No reliable information is available regarding Hizack's background before joining the crew, his personal motivations, his key relationships outside of the crew dynamic, his development over the course of the series, or any other specific abilities beyond his broad practical expertise and cannon operation.