Gender: Female
Year: Class 1-A, Ouran Academy High School
Appearance: Neat, androgynous features. 155 cm tall, with short hair at the start of the story. Because she wears the boys' uniform, everyone around her thinks she is a boy.
Personality: Airheaded and goes at her own pace. Easygoing and blunt, with an unintentionally sharp tongue. She is also calm, highly observant, dutiful, and kind.
First-person pronoun: "jibun"; generally speaks politely.
Top of her class, a commoner, a scholarship student, naturally kind, and often plays the straight man.

Gender: Male
Year: Class 2-A, Ouran High School
Appearance: Blond hair, violet-blue eyes, 183 cm tall, with the dazzling beauty of a prince.
Personality: Cheerful and sociable, a soft-hearted softy who cries easily. He has a narcissistic and slightly foolish side, but he cares deeply for his friends, looks after others well, and is the mood maker who holds the Host Club together—and is, technically, the president.
Speaks passionately about love, highly emotional, adores the club members, and is the King of the Host Club with a 70% request rate, though the members tease him as "the Lord." Skilled at piano. Half-Japanese with a French mother.
First-person pronoun: "ore." Uses polite speech with upperclassmen but casual speech otherwise. Often says things like "Isn't that right?!" and "Is it not so!"
Son of the chairman of Ouran Academy.

Gender: Male
Year: Class 2-A, High School Division
Appearance: A tall, handsome young man with black hair and glasses, exuding an intellectual air. 181 cm tall.
Personality: A calm, composed, and rational schemer. As the Host Club's vice president and manager, he is the "Shadow King" who runs the club. At first glance he seems calculating and profit-driven, but he also has a caring and compassionate side for his friends.
First-person pronoun: "ore." Speaks in an intellectual, composed manner.
Occasionally gives someone subtle special treatment.
The third son of the Ootori Group, which has a wide range of businesses including medical care and welfare.

Gender: Male
Year: Class 1-A, Ouran Academy High School
Appearance: 178.2 cm tall. A handsome boy identical to his younger brother Kaoru, distinguished by his hair parted on the right. Later he dyes his hair dark ash so he can be told apart from Kaoru.
Personality: Mischievous and impish. He has a childish, hot-blooded side and is jealous, flying into a rage if someone takes his favorite. At the same time, he cares about his brother and is somewhat more childish than Kaoru.
First-person pronoun: "boku." Generally uses casual speech with everyone.
His mother is the president of an apparel company, and his grandmother is the head of an ikebana school.

Gender: Male
Year: Class 1-A, Ouran Academy High School
Appearance: A handsome boy, 178.2 cm tall, with orange hair and yellow eyes. Identical in appearance to his twin brother Hikaru.
Personality: Slightly more mature and introverted than Hikaru. Has a calm and relatively sensible side, and is kind and deeply considerate. At the same time, like a true twin, he also has a mischievous, impish side.
First-person pronoun: "boku"; generally uses casual speech with everyone.
His mother is the president of an apparel company, and his grandmother is the head of an ikebana school.

Gender: Male
Year: Third-year high school student
Appearance: Small at 148 cm, with a youthful face and adorable looks. His large eyes are a distinctive feature, and he always carries his rabbit plushie, "Usa-chan."
Personality: Bright, innocent, and loves sweets and cute things. Usually soft and gentle, but is actually a martial arts master. Occasionally shows a dark, sharp side that earns him the nickname "Black Honey."
Commonly known as "Honey"; only Takashi calls him Mitsukuni.
First-person pronoun: "boku"; speaks in a childish, soft, and cute manner that matches his appearance.

Gender: Male
Year: Class 3-A, Ouran High School
Appearance: Tall at 192 cm, with sharp eyes and a sturdy build. Has a quiet, unapproachable air.
Personality: The silent, calm, and stoic type. A man of few words, but is actually very kind and caring. Gentle with animals and small things, and serves as a reliable older-brother figure in the Host Club. Also a kendo master.
Commonly known as "Mori"; only Mitsukuni calls him Takashi.