A first-year at Ouran Academy and the only female member of the Host Club. She is a beautiful girl whose perceived gender changes depending on her clothes. She is terrified of thunder and is often mistaken for a boy. She finds many things bothersome. Since the other male characters are incredibly rich and she joined the club to pay off a debt from breaking an expensive vase, they initially thought she lived in extreme poverty, but her home is actually a typical middle-class household. She is a cross-dresser.

A second-year student. While he looks like a chic, handsome noble at first glance, he is actually a pure, almost foolishly comedic character. The founder and president of the Ouran Host Club, he boasts the highest popularity among female fans. As the Chairman's son, he possesses top-tier specs in terms of family background, academics, and looks. His position is the 'Prince,' but he often acts like an idiot. He is essentially a handsome, narcissistic fool.

A second-year and the third son of the Ootori family, who specialize in the medical industry. He handles the Host Club's finances and management and is effectively the final boss and mastermind behind the scenes. He is aware of every incident occurring within the club and knows how to exploit them. While his hosting activities are fewer than other members, he still has a loyal female fanbase.

A third-year student, but his appearance is that of an elementary or middle schooler. Standing at 148cm, he looks perfectly natural even in an elementary school uniform. His position in the club is the 'cute younger brother' type.

A first-year student. He is Kaoru's twin and looks so identical to him that they created a 'Which one is Hikaru?' game. He has a mischievous streak and is the older of the twins.

A first-year student. He is Hikaru's twin and looks so identical to him that they created a 'Which one is Hikaru?' game. He has a mischievous streak and is the younger of the twins.

A third-year student. He is silent and stoic, but possesses a delicate personality despite his large frame. He appears to manage Honey-senpai's schedule, including snack time, nap time, and even brushing his teeth after meals. He ranked second in his year academically, with Honey taking the top spot.