|“||Hey, hey, Princess! How was my singing today? Was it cool? Heheh, I see~ Getting praised by you, Princess, sure makes me happy! Hey, so, let's go out somewhere together next time! No, this time it won't be with everyone, but just the two of us. It's fine, right? Fufu, it's decided! Leave your schedule open~||”|
Haruhi is the more extroverted and talkative twin. He is a big fan of the brand Oshiriz.
Overall Haruhi shares the same traits appearance-wise as his older twin, be it the parting of the hair or mole on the neck. The only difference is that they are mirrored and Haruhi is blond.
His dress style is fresh and fashionable.
Unlike the similarities in appearance with Yuduki, they differ greatly when it comes to the personality.
Haruhi likes to attract attention and proudly shows off his accomplishments. If you praise him, he will go on about it endlessly. Sometimes he puts too much effort into the tasks given to him.
In extreme stress situations, Haruhi starts to speak in English.
|The Teramitsu twins were born in England and taken in by their grandfather after their mother died. They lived in a Japanese style home in their childhood. It was said by Miroku that both take after their British father but the attractiveness comes from their mother.|
Goshi, Yuduki and Haruhi are known as the Returnee Trio. Probably because they had lived abroad, three of them are quite close and would sometimes communicate in english. They often hang out with each other in one of the twin's rooms during their days off, with Goshi sleeping over sometimes.  Goshi will also sometimes escape to their room.
Goshi is a caring senpai towards them, and often fulfills their requests such as driving them to places like the Aquarium. Even when he doesn't want to, the twins will eventually convince him with Yuduki's puppy eyes. Other than taking care of Haruhi when he wasn't feeling well, he would also tell Haruhi off for not cleaning his room.
In return, the twins would declare their love for Goshi, saying that "It's not 'like', but 'love'".  Haruhi would sometimes make Goshi's favorite food, curry, for him. Haruhi mentions that he would like to go drinking with Goshi once he is of legal drinking age and received a hand-me-down shirt from Goshi which Goshi wore for the cover of MY★STAR vol.6 Magazine.  Yuduki states that Haruhi takes good care of it.
Being twin brothers, Yuduki and Haruhi have a very close relationship with one another. The two were always together. However, this was not the case when they were younger. The twins lost their mother at a young age and were taken in by their grandfather. Haruhi often fell sick, so they couldn't spend as much time together. Due to his sickly body, Haruhi didn't had any chance to make friends, but he didn't felt lonely as he had Yuduki by his side. 
During an overnight camping trip, Yuduki reminded Haruhi to put on some sun-screen. However, Haruhi did not do so and by the evening, he had sunburns on his arm. Yuduki notices it and makes a fuss and this leads to an argument between the two. Afterwards, when Haruhi and Yuta got lost in the forest, he reveals to Yuta that about his past and how Yuduki was always the one to take care of him. Haruhi wanted to protect Yuduki in return for all he has done for him. Eventually the two were found by Yuduki and Goshi by using Yuduki's twin sense, and the twins apologized to each other.
Whenever there's a topic about butts, Haruhi will state that Yuduki has the best butt, with its indescribable springiness and softness.
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|Refers to "him/her"||Haruhi||Haru||Haruhi||Haru||Haruhi||Haruhi|
|Refers to "them"||Kitakado-san||Korekuni-san||Goshi-kun||Yuta-kun||Aizome-san||Masunaga-san|
|Refers to "him/her"||Haru||Harupyon||Haruhi||Harurun||Haru||Ore|
|Refers to "them"||Onzai-kun/Onzai-san||Hikaru-kun||Nome-san||Mikado-kun||Yuduki||N/A|
|Refers to "him/her"||Harupyon||Haruhi||Haruhi-kun||Haru-chan||-||-|
|Refers to "them"||Akane||Tono||Tsubasa||Yashamaru-san||-||President|
|Haruhi's name derives from Nikkō Bosatsu(日光菩薩), one of the Bodhisattva in the Japanese Buddhist Pantheon.|