Peipain is a rare dark kirin who serves as the bassist for BUD VIRGIN LOGIC. Abducted by a mysterious foundation during childhood, she was subsequently deployed as a personal maid to Ailane. Her comprehensive responsibilities encompass feeding, educating, and meticulously managing Ailane's schedule.

She maintains an unwaveringly calm and level-headed demeanor, remaining unfazed by unexpected events. As Ailane's impassive guardian, she consistently exhibits a serious expression while watching over and protecting her. Peipain is deeply attentive and reliable in all her duties.

Physically, she possesses striking purple eyes and blue hair styled in twin tails secured with black bows. Her attire consistently follows a black-and-purple theme, complementing her inherent kirin traits such as pointed ears and a tail.

Concealed beneath her skirt lies an arsenal of weapons. Peipain exhibits a fearsome presence when angered and harbors a distinct dislike for hostile forces. Her personal hobbies include altruism and extermination.

She is enrolled as a student at St. MIDI Girl's High School but does not attend classes. Her bass instrument is named Nosferatupain, a fusion of "nosferatu" (Romanian for vampire) and "pain" (English).