|Anime Debut||Episode 54|
|Manga Debut||Chapter 117|
Hasui (蓮井, Hasui) is Tatsuya Himekawa's personal butler.
Hasui has dark eyes and straight, black hair that reaches to the bottom of his neck. He wears a butler uniform, which consists of a black suit and tie along with a white undershirt.
Hisui very loyal to Himekawa and the rest of his families. He is also deeply concerned about Himekawa's well being. Altough sometimes he scolds him for wasting his allowance.
He made his appearance when he came to pick up Himekawa in his personal helicopter to fly to the newly rebuilt school. Later on, he appeared at the San Marx Private Fine Arts Academy to help Himekawa and the others escape with the portrait. When Kugayama asked if Himekawa hated her as a woman, Hasui answered that he didn't, and the reason he didn't fight her was because he knew he would have won.
Hasui is Himekawa's personal butler, and works directly under him. He is closer to him than any other servant, and usually carries out or is involved in all of Himekawa's orders.
- (To Himekawa) "Thank you for your hard work, Master Tatsuya."