- Birthday: February 4th
- Zodiac Sign: Aquarius
- Height: 155cm (5'1")
- Blood Type: O
- Good at subjects: Classical Japanese, English
- Liked Food: Sushi, ramen, strawberry
- Disliked Food: Sweet things in general

A lower-middle class freshman student who wins an attendance in Ouran High School through academic merit. Haruhi accidentally breaks a vase worth ¥8,000,000 ($80,000 in the manga's North American English version) from the host club, and since then she has been forced to work for them to pay for it. Without knowing she was actually a girl, they convince her to work as a host too, and she soon discovers she has a talent for the job as her "sensitive and girly boy" style quickly earns her some female admirers, to the point that the host club members decide to let her continue even after they figure out the truth. Her label is the 'natural' type. She has a weakness for (and so is occasionally bribed with) expensive food such as ootoro (a type of tuna sushi), as to her, they are a luxury. She likes tasty food in general, but gets especially excited over seafood.It also seems that the reason she's been studying so hard up to this point, including being able to attend Ouran Academy, is because she wants to follow in her mother's footsteps and become a lawyer.

Seiyū - Maaya Sakamoto