Dan Fuyushi is an ultimate student at Hope's Peak High and is the Ultimate Mechanic, alongside Kazuichi Soda. He is known to be laid-back, goofy, comical, book dumb, timid, clumsy, and extremely gassy. Dan is known to have numerous gastral episodes where his belly begins to bloat painfully and embiggen to the point where it's spilling out of his shirt, and even his buttocks blimp up. Whenever Dan's like this, he usually runs to the bathroom to relieve himself. No matter how much he eats, how much he doesn't, or how much he holds it, the pain in his stomach is nevertheless immense and bloating with tons of gas. Even releasing the gas would cause a loud sound that can be heard throughout the men's restroom, thus given a private bedroom equipped with a private bathroom in the boys dorm. You'll notice Dan ready to blow whenever his stomach rumbles loud. This causes Dan to have trouble with everyday life and has to do schoolwork in his private room during school hours, thus making it harder for him to have friends. Fortunately, Chi Makita, the main protagonist and Dan's childhood friend from preschool, visits him from time to time so that Dan wouldn't have to feel lonely, forging a brotherly bond with each other that can never be broken and marking Dan as one of Chi's supportive allies. Currently, Dan is one of the sibling bonding members Chi forged so that his family and friends can come along to hang out.