Jekllyn N. Heidi

Jekllyn N. Heidi (ジェクリン・N・ハイジ, Jekurin N haiji) also going by the name Gemini (双子座, futagoza) or just simply Two Faced (二人の顔, Futari no kao), she is a pirate and mass murdered who enjoys cutting her victims bodys into beautiful and intricate designs. She also works as a doctor, though she faces the everyday problems of being a person with an entirly second personality she is a great doctor and asset.

Trivia

 * She is heavily based on the her name  being a "Female version" of both Jekyll and Hyde's names