Ryomou is a third-year student at Nanyo Academy. She is an odd girl with short blue hair and green eyes, a distinctive beauty mark on her left cheek, and a very strange history, mainly tied to her mysterious left-eye patch, and is always seen wearing fingerless gloves and combat boots. Powerful and a B-rank, she is also one of Nanyo's Big Four. She has a habit of wearing a blue miniskirted French maid outfit, and specializes in submission wrestling moves, throws, and joint attacks which she uses in conjunction with a pair of handcuffs she carries, and is also very proficient in making chi blasts. Her earlier life before she became a fighter is unknown, but is hinted as being tragic and painful.