OVA
Description
Carly is a short beast person appearing in her mid-teens, possessing a childlike and frail build. She has brown hair in pigtails and prominent, unconcealable animal ears atop her head. Her typical outfit—a white shirt with frilly collars and a knee-length blue skirt—enhances an elementary school-like look. Physically weak for her kind, her upper-body strength and agility are merely three to five times an ordinary human's, placing her at the lowest tier among beast people.

Abandoned by her birth parents, Carly endured severe abuse and neglect in both human and demon societies. Criticized as useless and subjected to physical violence, she faced extreme isolation until near death from cold and starvation. December rescued her, offering a place in the terrorist group Tartarus Lapse. There, Carly learned sniper skills from Senga Takehito, evolving into their most potent marksman. Her existence gained meaning solely through serving December; she held no personal interest in Tartarus Lapse's goal of destroying Demon Sanctuaries or any grudge against demons. She carried out assassinations only to validate her place beside December, displaying no guilt.

Carly's physical limitations paradoxically enabled her exceptional sniping talent. She possessed the precise arm strength to withstand powerful rifle recoil and delicate finger control for human weaponry. Her senses of hearing, smell, and night vision were outstanding even among beast people, while her kinetic visual acuity allowed her to track bullets to impact. These traits let her detect moving targets at 900 meters, excelling in long-range combat. Her primary equipment was a bullpup-style anti-materiel sniper rifle concealed in a cello case, alongside a large-caliber automatic pistol for defense. The rifle symbolized her bond to Tartarus Lapse and December; losing it would sever that connection.

During Tartarus Lapse's operations on Itogami Island, Carly helped isolate the island through coordinated terror. She sniped a director of the Artificial Island Management Corporation to disrupt command and attempted to assassinate Asagi Aiba, the Priestess of Cain, on December's orders. Her role included providing sniper cover, notably critically injuring Natsuki Minamiya with a magic bullet.

Carly's loyalty fractured when December, revealed as the Tenth Kaleid Blood (Dekatos), returned to the Fourth Progenitor. This severed her primary reason for existence within Tartarus Lapse. Following the group's defeat, she transitioned away from combat, finding an ordinary life under the care of Motoki Yaze and his family. This marked her departure from being a weapon, her earlier life defined by devotion to December alone.