Masaru is a middle-aged man of average height and build who has short brown hair similar in style to his wife and son, a short mustache and rectangular glasses.
Compared to his hotheaded wife and son, he seems to be more calm and less prone to violence.
However, he clearly loves his family very much and gets along well with his wife as he, too, does not approve of his son's arrogant attitude.
At some point, he met Mitsuki at the job and she aggressively hit on him which led to a relationship that progressed to them getting married.
Sometime later, Masaru became the father to their son, Katsuki Bakugo.
Masaru tries to calm his family down when Toshinori Yagi and Shota Aizawa arrive. After calming down, Mitsuki Bakugo notes that Katsuki Bakugo's rashness along with his gifted abilities, has resulted in him being pampered and getting shallow praise for what he has which has resulted in his arrogant nature. However, Mitsuki is happy that Shota sees her son for who he is instead of his gifted abilities. She once again agrees to leave Katsuki in U.A. High's care since her son returned home safe and sound thanks to the Pro Heroes and asks Shota to make her son into a fine Hero.
Acid Sweat (酸化汗 Sanka Kan?): Masaru's Quirk allows him to secrete acidic sweat with combustive properties from the palms of his hands, however, he cannot forcibly secrete it, it comes out like normal sweat. If he rubs his hands together, then he can create explosions.
- He likes classical music.
- Masaru's own name means "victory"
- Katsuki shares the same syllable as his father being "勝" (Katsu).