the younger of the Hitachiin twins and is in Class 1-A with his identical twin Hikaru Hitachiin and fellow Ouran Host Club member, Haruhi Fujioka. Despite being younger than Hikaru, he is shown to be more mature and level-headed. Playful, mischievous, wealthy. When apart from his elder brother, Kaoru becomes a pleasant person, acting in a selfless and serious manner, but when he is with his elder twin, he reverts to being a scamp-like individual. Although the twins have spent the majority of their lives interacting only with one another, Kaoru demonstrates an understanding about social interactions and innate self-control. 15, 5'10.

She is a highly intelligent 1st-year student from a middle-class family, though considered "poor" and "common" by the wealthy elite members attending Ouran Academy. As she is required to remain first in her class to keep her scholarship, her studies are vital to her. Due to a freak accident, she is enlisted by the Ouran Host Club to play a Host. She is blunt in her communication, seeing no point in being less than completely honest. Her insight into the motives of others' behavior is keen, though she is clueless about her own feelings, particularly when it comes to those of physical attraction or romance. Having been raised under less affluent circumstances than her classmates at Ouran Academy, she displays more practical and responsible qualities, and is not easily swayed by the Host Club's charms. Even when she first meets the boys, she only reacts nervously instead of becoming instantly infatuated like other girls. Haruhi also has a deeper voice than other female students, has short hair and dresses in an androgynous style most of the time; thus, she is not easily recognized as female. 15, 5'1.

the president of the Ouran Host Club who is in Class 2-A, the same class as Kyoya Ootori (Tamaki's best friend and co-founder of the Host Club). . Although his outward manner would be best described as flamboyant, egotistical and dramatic he is, in fact, a young man dedicated to his studies, his friends, and his duties as a host. He is considered the "Princely" type, entertaining his female clients with upper-class etiquette and shameless flattery. He views the club as his "family" Although there are instances where he demonstrates brilliant insights that surprise many, he still remains a goofball and a flirt most of the time. He is, at heart, a generous and kind person. 16, 6'0.

a 2nd-year student at Ouran Academy who is also the cost-conscious and calculating vice-president of the Ouran Host Club that he co-founds with his best friend, Tamaki Suoh. Despite Tamaki's position as the President, Kyoya is the true director, playing the role of a puppet-master behind the scenes. Kyoya is a calm and logical guy who has superior intelligence. He also can come across as rather detached, and sometimes threatening when need be. He is a diligent secretary for the club and tracks continuous data on the club's guests and fortunes through his netbook, tablet or notebook. He is very fond of his best friend, Tamaki Suoh, giving him free rein when it comes to implementing his ideas for the club. 17, 5'11.

is the elder of the identical Hitachiin twins and is in Class 1-A with his younger brother, Kaoru Hitachiin, and Haruhi Fujioka. Although he is considered the "leader twin," he is less mature than Kaoru when it comes to managing his emotions and dealing with others. It has been shown that although their looks are identical, Hikaru's character differs greatly from that of Kaoru's, and he is more dependent on his brother than the reverse. Because of his immaturity in dealing with others, Hikaru is childishly over-possessive of each club member. 15, 5'10.

an older boy who is attractive to girls because he is child-like and cute. Honey, himself, loves cute things and indulges in sweets of cake and candy on a near-constant basis; this, despite being smaller than average for his age and a martial arts champion. He is a perennial optimist with an innocent approach to life that makes him appear to be more like an elementary school student instead of a 3rd-year high school student, as well as the eldest of all the Hosts. He is often seen riding on the shoulders of his best friend and cousin, Takashi "Mori" Morinozuka, and is almost always carrying his pink stuffed rabbit, Usa-chan. When he speaks about positive things, flowers float about his head. Despite his childish hobbies, Honey is more mature than he seems. He has insight into the feelings of others, often able to predict when one person has feelings for another. He also has good advice for people. 17, 4'10.

a 3rd-year student at Ouran Academy and the second-oldest member of the Ouran Host Club. Mori only speaks when something needs to be said, his intelligence and observant nature taking in much more than many of the people around him realize. This makes him a wise adviser to those who seek his counsel or need it subconsciously. 17, 6'4