Hatori Sohma. His age is 27 and the Dragon of the Zodiac. He is the private doctor to the Sohma clan. Hatori is a very serious and humorless type. It is his job to erase the memories of those who discover the Sohma clan secret, though it's not entirely clear if this is simply a form of hypnosis or more of a supernatural power. When his curse activates, he turns into a seahorse rather than a giant fire-breathing lizard. It's because the Chinese consider the seahorse to be baby dragons and the actual name in Japanese translates to it.

He is very self-conscious about his transformation in the fact that he is the "great and powerful dragon" but appears as a "seahorse".

He had a bad experience whe he loved a girl named Kana, her assistant. Like Shigure and Ayame, he is very tall and is really a nice man when you look at him closely. He is to be married to Mayuko-sensei in the Fruits Basket canon arc.

Hatori is the kind of guy who usually likes to look responsible and professional. He can barely see out of his left eye, because Akito hurt it when Hatori wanted to get married. Hatori seems sort of jerky when you first meet him, but you eventually understand that he's not, and the reason why he acts as such.