Amaki Seina | Blue Ursus

She studies at Gokumon Girls High School, a school for female delinquents.

She is giant and muscular (181 cm and 82 kg), strong and uses professional wrestling as her style.

Her real goal: to discover who killed her mother and provoke the killer by using recorded fights to make him come for her.

Social circle:
Her partner: Yukimura Maya, the strategic brain, the one who records and manipulates everything, also helps Amaki become more charismatic. She is the daughter of an old friend of Amaki's mother, Seina.

Seina is energetic, loud, and impulsive. She's known for her gluttony (especially for rice and meat), her carefree attitude toward life, and her unpredictable behavior. But beneath that exuberant exterior hides a girl marked by constant struggle and silent pain.

When angered or provoked, he transforms completely: brutal, relentless, and almost savage. His transformation is so intense that even his closest allies fear what he becomes.

Seina loves Japanese rice; this is because, when she traveled the world with her mother, they only ate noodles and bread.

Seina is a formidable hand-to-hand combatant, with years of training in professional wrestling. Her style comes directly from the teachings of her stepmother, which emphasize brute strength and overwhelming her opponents with powerful punches, lassos, and flying kicks.

Seina's signature technique involves rapidly closing the distance between herself and her opponent to reduce the force of their blows.

Seina spent most of her life abroad, traveling to different countries with her stepmother, the infamous professional wrestler Brutal Matsumoto, a legend in the world of women's wrestling. She returned to Japan at the end of her third year of high school to uncover the truth about her mother, who was murdered under suspicious circumstances during an underground fight years earlier.

Driven by the need to uncover the truth about her mother's death, Seina teams up with Yukimura Maya and begins recording their fights, uploading them to online platforms under the name @masked_highschoolgirl. Her goal: to provoke and lure her mother's killer, someone allegedly connected to the underground fighting scene. However, just five days after posting her first video, the account was blocked. The violent content made her videos incompatible with public platforms.

It was then that their older sister, Amaki Fumina, intervened, suggesting they venture into more dangerous territory: the dark web. She also pointed out how simple Seina's mask was, so she gave her the Blue Ursus mask, a masked identity based on a facial transformation trick their mother had been preparing before she died. Although they prefer to stay away from the deep web, their video attracted the attention of a former classmate of their mother's, who is also searching for her friend's killer.