The youngest member of Hell Seether, where she joined after the height of WW3, had slowly reduced to ashes. Her intention is to refresh her strength in the notorious mercenary group under the leadership of Tokino Shutoko.
Years by years, and with each layer of hell she's passed through, Tokino Shutoko suddenly treats her like a special child because of her unique strength that always mimics her enemies' movements.
There's a saying that only Hell Seether's members could dismantle this mercenary group. And this girl could be one of them. But she doesn't care about that; she just wants to kill for her own desire and even Tokino's desire.
PS: Inspired by Ciel from Tsukihime.