De Arach

Background Arach attended university with Makihisa Tohno and studied architecture alongside him. It was through this connection that she became the family’s resident doctor following Makihisa’s death. She still does architectural work as a secondary source of income alongside her career as a doctor.

She has some relation to the Twenty-seven Dead Apostle Ancestors, in particular the Rose Princess Rita Rozay-en. The serum she injected into Noel is called an Idea Replica, and gave her Rita's Mystic Eyes of Roses, implying that Dr. Arach's procedure somehow granted Noel some of Rita Rozay-en's other abilities, as she also gains the power to sprout thorny vines from her person after injecting herself with the final Idea Replica serum that Arach had given her. She also appears to have some unknown connection to Roa, as she displays knowledge of Noel's past, making comments regarding her psychology to Shiki after Ciel's battle with Vlov. It is also implied that Dr. Arach is the "Modding Maniac" mentioned in Vlov Arkhangel's profile, as well as the "certain Dead Apostle" who gave him a technique that allowed him to retain his sanity until the end.

Arach is a woman with light brown hair and amber eyes. She doesn’t wear makeup, and her hair is arranged in a very messy way.[3] She wears a white lab coat with a yellow-and-black checkerboard pattern on the inside over an orange blouse, black skirt, black-and-orange tights, and black high heels. She has very large breasts, and wears her blouse with the top opened as to completely expose her bra and cleavage. Around her neck is a gold necklace with a red jewel attached to it.

An energetic scientist with a habit of skipping work. Everything Dr. Arach does appears to be done on a whim, and she refers to to herself as a "free spirit pulled away from her roots", saying she was a "spider without a web going wherever the wind would take her" before she met Makihisa. Her behavior is loud and hyperactive, with very little consideration paid to what those around her consider appropriate conduct, and all of her emotions greatly exaggerated. She displays very visible glee or disappointment when interacting with Shiki on medical business, whether it be treating wounds or administering vaccines of questionable origin. Due to her medical background, she will occasionally refer to biological characteristics or chemical interactions within the body when describing her emotions. She is also extremely sexually forward, talking about her own arousal in frank terms and wearing highly revealing clothing.

Dr Arach is mainly a scientist, but she's also a qualified architect and can work as a surgeon on a professional level despite not having a license. Despite her eccentric behavior and questionable ethical principles, she is a highly skilled medical doctor. Her skills as a doctor and surgeon allow her to provide not only for normal humans, but also half-Oni such as the Tohno family, including those with highly unstable blood like Akiha