“Humans often act like small birds. Like small birds, they are about to be attacked by hawks and eagles flying high in the sky, yet they don’t notice.”

Kirukiru Amou, is a main antagonist student who has been sent to The Private Aichi Symbiosis Academy after being part of a huge brawl. After a while, she was known as "EMPRESS" at Private Aichi Symbiosis Academy.

Amou is a a very beautiful girl with a curvaceous figure. She has long black hair that reaches her knees, and dark brown eyes. She is usually seen wearing the academy's uniform, which consists of a cropped blue blazer, an off-white button-up dress shirt, and a skirt which is the same blue as the blazer. She wears a red tie with the dress shirt, and wears stockings with black boots.

She has an outfit she wore casually, which consists of a purple short sleeved shirt with a purple belt, and a long white skirt that reaches just slightly above her knees. She continued to wear stockings with this outfit,

Amou is a deranged psychopath who is mainly motivated by her obsession with her former friend, Nomura Fudou. She is willing to do anything to have Nomura all to herself, even kill anyone who she perceives as an obstacle in term she has a very "yandere" personality. She is also very cruel and condescending, especially to those she considers beneath her. Amou also has the compulsion to dominate others, which is partly the reason for said obsession with Nomura, who refuses to submit to her.

Before she transferred to Private Aichi Symbiosis Academy, she fought against Nomura. She managed to inflict injury onto Nomura and he was hospitalized.

After transferring to Private Aichi Symbiosis Academy, she single-handedly defeats two of the Supreme Five Swords (Tenka Goken); Onigawara Rin and Kikakujou Mary. She then was known as "EMPRESS". Amou Kirukiru falls in love with Nomura Fudou when they were at their previous school. Amou Kirukiru was very jealous after seeing Nomura Fudou get kissed by Onigawara Rin. In her jealousy, she said “Humans often act like small birds. Like small birds, they are about to be attacked by hawks and eagles flying high in the sky, yet they don’t notice.”