Also known as: ベアトリーチェ(ブルーアーカイブ)
One of the antagonists in Blue Archive and a member of Gematria. Roughly 10 years prior to the Sensei (Blue Archive)'s arrival, she took over the Arius Branch School following a civil war and turned it towards extremist and nihilistic beliefs. Her ultimate goal is to use Atsuko as a sacrifice to summon an unknown, but highly-destructive entity that will lay waste to Kivotos. She is a red-skinned woman with long, Black Hair and a voluptuous figure. Her attire consists of a tight-fitting White Dress and a feathered headpiece with a number of eyes. She does not usually have a visible mouth, but when she smiles the skin of her face tears open to reveal Sharp Teeth.