Height 149 cm (before X-10) An orphaned girl who became Bronya's closest friend at Cocolia's orphanage.

Spoiler

Her alter ego, Hei Seele Vollerei (黑希儿·芙乐艾), has control of her True Stigmata's power. Hei Seele's personality is drastically different from Seele's and is initially ruthless and unkind, but this later on changes as she learns to care for Seele, and eventually even her friends. She has a violent reaction with people she sees as a threat to herself or Seele, and is particularly overprotective of her, showing worry any time she battles. She also has the habit of staring at Seele's face while she is sleeping. A lot of the time she is quite dishonest about her feelings, putting up a tough act rather than admitting she cares deep down. She is easily provoked and jealous, and quick to suggest more forceful means of action in most situations. She also dislikes being considered a monster.