Yoshiaki Taruo is the reclusive Ultimate Chemist who is constantly self-depreciating and has extremely low self-esteem. Yoshiaki is an eternal pessimist, always seeing things in the worst of lights. He is constantly hating on himself, believing that he doesn't deserve any friends, or hardly even to live at all. Yoshiaki believes that other people see him this way as well, often misconstruing people's words, and twisting them to fit his misguided thoughts that people hate him. Yoshiaki prefers to stay away from attention, as well as just people in general.

As the Ultimate Chemist, Yoshiaki spends most of his time alone in his room, experimenting. He comes out only a couple times a week to eat, resulting in him becoming malnourished. The amount of time that he's spent in a room full of chemicals made his hair turn pink, his eyes turn grey, and resulted in multiple burns across his face and body.

Yoshiaki has a medium to medium-high voice. His voice sounds a little bit nasally, with a small amount of rasp to it. Yoshiaki speaks without confidence, and often stutters. When he gets upset, his voice gets a bit deeper, with more rasp. If I had to compare his voice to a canon Danganronpa character, it would be closest to a less confident Fuyuhiko Kuzuryuu, but I'd recommend not getting too hooked up on that.