Due to their interactions, Chuma presents an antisocial and misanthropic behavior, insulting and threatening every person who speaks to him, even if they do it in good manners. He also has mental instability and great dependence on drugs, quickly injecting three capsules of Trigger that is offered to him by Kuin Hachisuka, only to attack her shortly after injecting the drug.

As this manga does not have an anime, there is no exact voice for him. He is an adult male. If you could please give him a medium-to-lower pitched voice, that would be great!