She's got a pretty unique ability—she can weaponize sound waves through singing to take down Phantoms. You'll almost always see her with headphones on, which has kind of become her signature look.
Her backstory's actually pretty rough. Her powers showed up early, which made childhood genuinely isolating. Her classmates, friends, and even her own parents ended up fearing her because of how strong she was. That kind of rejection shaped her into someone who just prefers working solo now. She's not unfriendly exactly, but she's learned to depend on herself rather than rely on people who were afraid of her in the first place.
Content compiled by AnimeList.moe from publicly available sources.