Birthday/Origin: April 20, from Shizuoka Prefecture. 16 years old. U.A. High School Class 1-A, Seat 13. Quirk: Explosion (Secretes nitroglycerin-like sweat from his palms and ignites it). Hero Name: Great Explosion Murder God Dynamight. Features: Ash-blond hair, red eyes with sharp pupils. Top-tier grades and multi-talented, capable of cooking and playing drums. Personality: Confident and aggressive, but possesses a strong sense of justice and is seriously aiming to be the top hero. Relationship: Gets along well with his family. Quotes: "This is where it starts!! I'm...!! From here...!! Listen up!? I'm gonna be number one right here!!!" "You don't have to tell me, I'm gonna be a hero who surpasses even you!"

Mother. Birthday: December 1. Age: 38. Height: 170cm. Likes: Volleyball. Appearance: Looks just like her son. She constantly bickers with Katsuki, who calls her "Old Hag." Background: She met Masaru at work and married him after aggressively pursuing him. Personality: While she may seem crude, she is actually quite sensible. Quirk: Glycerin. Perhaps due to its effects, she looks remarkably young for her age. Her skin is said to be very supple and has moisturizing properties. Special Move: Mother's Fist (Big Mother Crush) - A move used during her parent-child fights with Katsuki.

Father. Birthday: March 15. Age: 42. Height: 177cm. Likes: Classical music. Personality: Unlike his wife and son, he is reserved and quiet. Characterized by his glasses and mustache. Traits: He isn't good with assertive people, which is why he can't stand up to his son or wife. The reason he ended up with such a strong-willed wife is that he was won over by her relentless advances. Quirk: Acid Sweat. Secretes acidic sweat from his palms that has combustible and explosive properties. It only seeps out slowly like normal sweat, but can cause explosions if he rubs his hands together vigorously. Background: He once dreamed of being a hero but became interested in design; he currently works in a design-related field. As mentioned, he met Mitsuki at work and married her after her intense courtship.