Vent is an autistic guy. There are times he is clueless due to curiosity. His annoyance tends to make everyone stay away from him. Diagnosed with Asperger Syndrome, he is very clever at things but does get easily distracted whenever he sees something he likes. He also tends to fart even in public, increasing his annoyance. When he played the Persona Nonary Game, his actions are becoming more mature thanks to Koppa. He is very energetic. He'll find something to play with even if it's small or just his hand.