Works as a host to repay a debt, initially pretending to be a boy, and is often the voice of reason for the club members. Short brown hair (initially), brown eyes, and an androgynous style, leading to her being mistaken for a boy. Blunt, honest, practical, and non-judgmental, with a deep understanding of others' motives but clueless about her own romantic feelings. Comes from a middle-class family and attends Ouran Academy on a scholarship, making her an outsider among the wealthy students. Identifies as female but believes gender is irrelevant, leading her to be comfortable presenting as male when necessary.

Egotistical and dramatic, but genuinely caring, sweet, and dedicated to his club members, whom he views as his family. Pale blond hair (from his French mother) and violet eyes (in the anime), with a tall, slender build. Illegitimate son of the Ouran Academy chairman, he grew up in France with his ailing mother before moving to Japan. Sees the Host Club as his family, with Kyoya as "Mommy" and Haruhi as "Daughter," despite secretly being in love with her. An accomplished classical pianist and surprisingly intelligent, despite his goofy behavior.

Small for his age, with a cute, childlike look, often with flowers floating around his head when he speaks. Cheerful, optimistic, and loves sweets, but can become surprisingly fierce when angered or woken up. A martial arts master, considered one of the best in Japan, though he rarely shows his full power. The oldest member of the Host Club, he acts as a mentor and is very perceptive, often seeing things others miss. Almost always with his cousin Mori and his pink stuffed rabbit, Usa-chan (Bun-Bun).

Takashi "Mori" Morinozuka is a main character in the manga and anime series Ouran High School Host Club, known as the strong-silent and wild type. He is a tall, quiet third-year student at Ouran Academy.He is the second-oldest member of the host club. He is the protector and cousin/best friend of Mitsukuni "Honey" Haninozuka.Considered the "strong-silent" type in the anime and the "wild" type in the manga.He is a national champion in kendo and very good at karate.

Kaoru Hitachiin is a main character from Ouran High School Host Club, the younger of the identical Hitachiin twins, known for being the more mature and level-headed of the two, despite his mischievous "little devil" persona with his brother Hikaru. He is a first-year student at Ouran Academy and a member of the Host Club, where he and Hikaru perform a "forbidden brotherly love" act for guests, though Kaoru is often shown to be kinder and more considerate. A key visual difference is that his hair parts to the left, while Hikaru's parts to the right. More mature, selfless, and considerate than his twin, though he can be mischievous when with Hikaru. Identical to his brother, but his hair parts to the left (Hikaru's parts to the right). He often wears different colored or styled clothes than Hikaru. He and Hikaru are "little devil" hosts who use their identical appearance and "forbidden love" act to attract clients. They share a deep bond from a lonely childhood, but Kaoru is often the one who breaks the twins' cycle of dependency, especially after meeting Haruhi.

Hikaru Hitachiin is a main character in the manga and anime series Ouran High School Host Club, where he is a wealthy first-year high school student and a member of the elite school club. He works alongside his identical twin brother, Kaoru, as a "little devil" host who charms clients with displays of brotherly love.Older of the Hitachiin identical twins, though he is often less emotionally mature than his younger brother Kaoru.Class 1-A at Ouran Academy, alongside his brother and Haruhi FujiokPlays on the "forbidden brotherly love" trope with Kaoru to entertain the club's female guests.Prone to mischief, stubborn, and initially closed off from the outside world until Haruhi helps change his perspective.

Cool, logical, and pragmatic, but also secretly passionate and loyal. Hypotensive Devil" due to low blood pressure causing morning grumpiness. Genius-level intellect, business acumen, and strategic planning. Comes from a wealthy, influential family, and is the third son, which motivates his need to be inconspicuous. Best friends with Tamaki Suoh, and acts as a supportive, if sometimes cynical, friend to the other hosts and Haruhi Fujioka.