• Tamaki Suoh (René Tamaki Richard de Grantaine Suoh) • The "Princely" Type: The flamboyant, dramatic, and deeply empathetic founder and president of the Host Club. • Role: While he comes across as a well-meaning idiot and an extreme narcissist, he cares intensely for his friends. He acts as the self-appointed "daddy" of the club and holds deep, initially unrecognized romantic feelings for Haruhi.

• Haruhi Fujioka • The "Natural" Type: A down-to-earth, pragmatic, and highly intelligent scholarship student who represents the rare "commoner" demographic at the school. • Role: After breaking a ¥8 million vase, she is forced to dress as a boy and work as a host to clear her debt. She is blunt, unfazed by luxury, and possesses a natural charm that makes her highly popular with the clients.

• Mitsukuni "Honey" Haninozuka • The "Boy Lolita" Type: The eldest member of the club who deliberately projects the image of a tiny, cute, cake-loving child. • Role: Despite his innocent appearance, Honey is a fierce martial arts prodigy from an elite warrior family. He chose to join the club to embrace his love for sweet things and stuffed animals rather than conforming to rigid expectations.

• Takashi "Mori" Morinozuka • The "Wild" / "Strong and Silent" Type: The quietest, tallest, and most physically imposing member of the club. • Role: A national kendo champion, Mori serves as Honey's fiercely protective cousin and constant shadow. He rarely speaks, but his calm, unwavering presence offers grounded support to the chaotic energy of the rest of the club.

• Kyoya Ootori • The "Cool" Type: The calculating, brilliant, and pragmatic vice-president and co-founder of the club. • Role: Kyoya handles the actual management, budgeting, and monetization of the club. Often called the "Shadow King," he puts on a polite facade but works ruthlessly behind the scenes to keep the club functioning smoothl

Hikaru Hitachiin (The Elder Twin) • Personality: Arrogant, willful, and highly impulsive. Hikaru is the less emotionally mature of the two brothers and often reacts with jealousy or possessiveness. • Host Club Persona: Together with Kaoru, he plays the mischievous "Little Devil" type. They masterfully perform a staged act of "forbidden brotherly love" to charm their clients, though Hikaru is generally cast as the more aggressive partner (seme) in their routine.

Kaoru Hitachiin (The Younger Twin) • Personality: Calmer, wiser, and significantly more mature than Hikaru. He is deeply empathetic and serves as the grounding force for his volatile brother. • Host Club Persona: He shares the "Little Devil" role but acts as the more passive, receptive partner in their performative dynamic.

Renge Houshakuji (The Host Club Manager) • Personality: Hyperactive, intensely passionate, and an avid otaku obsessed with dating simulators (visual novels). She is outspoken, highly dramatic, and regularly prone to entering loud, theatrical fantasy monologues. • Role in the Club: She originally transfers to Ouran Academy believing she is engaged to Kyoya Ootori because he looks exactly like a dating sim character she loves. After realizing reality is different, she appoints herself as the Host Club's manager.