Hei Seele Vollerei 黑希儿·芙乐艾

Hei Seele is a being awakened inside Seele Vollerei, originally referred to by the latter as "the other me". She originates from the stigma on Seele's chest, giving her greater control over the stigma's power. Hei Seele vowed to protect Seele, the meaning of her existence, from all harm that should come her way.

Hei Seele acts violent, cruel, and even sadistic towards her enemies, but is straightforward in conveying her genuine feelings of goodwill to those she cares about. Still, she prefers fighting and violent solutions to solve problems, especially to protect Seele and her friends. A being born from the desire for protection, her identity revolves around being Seele's protector. However, this means that as Seele continues to grow more independent and mature, Hei Seele is starting feel anxious about being forgotten and left behind.