Gen is a tall, athletic young man with a lean yet muscular build. His hair is naturally all black, but he dyed the front section of his hair grey to give it a two-toned color. This allows him to switch his hairstyle between a black bob with hints of grey (generally when he is off-duty) and slicked back, revealing the majority of his grey hair (mostly during combat). He also has sharp, red eyes and his eyebrows are very short and thick.

Despite showing an apparent serious demeanor, Gen hides a lazy and childish personality, overreacting when slightly annoyed by something. His unprofessional demeanor brings him to give priorities to futile things over work like his video games and action figures, or his followers on social media.

Nevertheless, once he arrives on the battlefield, Gen's attitude changes radically, becoming very serious and dedicated to his work as captain of his own division, giving specific orders to his subordinates.

ENGLISH VA: Aaron Dismuke (Chigiri Hyoma, Alphonse Eric)