Ruka Suirenji

Height: 149 cm (4'10")

Ruka is an idol and a doujinshi creator under the pen name Fly Dolphin. She is Chiharu's friend.

~!According to Chiharu, Ruka has a similar past to Hayate, having been abandoned with a large amount of debt, namely, 150,281,000 yen. She aspires to be a professional mangaka. Ruka's pen name, Fly Dolphin, was originally the name of the performance office her parents used to own.!~

~!She eventually realizes that she is in love with Hayate and confesses to him, but he rejects her because he is working as a butler for Nagi. Ruka challenges Nagi to see who will sell more copies of their doujinshi. A sum the height of Hayate's debt will be the prize.!~