Also known as: ファウスト(ブルーアーカイブ), 浮士德(碧蓝档案), 阿慈谷日富美(浮士德)
The masked (by a Paper Bag) alter-ego of Hifumi, and (supposed) leader of the Masked Swimsuit Gang. Named in reference to the Guilty Gear character of the same name due to him also wearing a bag on his head.
Often portrayed in fanart as actually being the ruthless influential kingpin people think she is.