Firecracker (Bakugo twin x Kirishima) Soulmate AU

Katsumi Bakugo is the twin sister of Katsuki Bakugo and has a very powerful quirk. It is called Nitro-Control, it allows her to secrete an invisible, odorless, nitroglycerin like gas and ignite it from a distance. Her quirk takes a lot of her oxygen to create the gas and if she goes over her limit she can have severe asphyxia so she sings a lot to work on her lung capacity and often while training will create as much gas as possible until she can't anymore. She also trains by producing a lot of small clouds and lighting them so she can make her gas more potent and sometimes she tries to see how far away it can be so she can still light it to increase her range. She has a very close relationship with her father because she is more like him than Katsuki and her mother. Katsumi has undiagnosed depression and anxiety because she feels like she has always spent her life in her brother's shadow even though she is stronger than him. She is constantly worrying about being good enough and what people think of her. She has long, blonde hair and red eyes, she is about 5'4 and very athletic built. In her world people suddenly get a song on their 13th birthday that is unique to only them and their soulmate, they know that they have found their soulmate when they know the same song.