She is the daughter of Katsuki Bakugou, a 17-year-old student at the second year at UA. Y/n is identical to Katsuki and has inherited his quirk as well, but a little more evolved. She can control the timing of her explosions. she and Toshi struck by a quirk during a villain attacks and sent back to the past in their fathers's third year at UA. but they aren't even injured. They just lost consciousness. Along with her is Toshi Midoriya-Izuku and Ochaco's son, and also her boyfriend. and together they try to find a plan to bring them back. She is Toshi's girlfriend. Her mom died (her mom died was a normal quirkless woman who died in a collapsed building a cause of a villain attack) when Y/n was 5 so after that it was just her and Katsuki.