A brilliant woman with the stoic —yet insufferable— pride to back it up, her smarts lead to Limbus Company personally scouting her and Faust's employment. With fellow scientist Yi Sang, Faust later developed the company's private bus, Mephistopheles. She expresses that she always gets up after three hours of sleep (and used to believe that everyone does this), and does not concern herself much with hobbies. Uses her E.G.O suit "fluid sack" that alters her personality a bit.