My Hero Academia: The Deaf Spiriter

Sora is the twin sister of Katsuki Bakugo, the mean, explosive, and cocky guy. No one could believe that Katsuki has a sister like her, because she's the polar opposite of Katsuki. She's shy, kind, and helpful. Although, she has a condition... she's deaf. Being unable to hear since she was born, she almost had no hope of becoming a hero. One day, she was kidnapped from her home when she was just 6 years old. For 3 years, Sora was captured and was experimented on to manifest an unknown quirk. Being saved by Pro Heroes, she reunites with her twin brother, who had been getting stronger for the past 3 years. Katsuki, who had been training his quirk to protect his sister, learns of the quirk his sister was forced to manifest. He quickly became Sora's bodyguard and protector as the years went on. He also had learned sign language to communicate with his sister better and was always there for her no matter what it was. Now, both Katsuki and Sora are applying to U.A, at first, Sora was hesitant about going, but Katsuki insisted she attend U.A as it's the best place for her to improve her quirk. While being a student at U.A, she slowly gets closer to her classmates and she starts being more like how she acts around Katsuki. Eventually, things get complicated when the League of Villains interferes with her and her classmates. (Pic, not mine. Credits to the real artist)