Yuki Rurikawa (瑠璃川幸, Rurikawa Yuki) participates in the Summer Troupe as a costume specialist and actor. He loves wearing cute feminine clothes. However, his personality is rather frank and brazen, and he often goes off at his seniors. After he did the costumes for the Spring Troupe's Romeo and Julius, Izumi Tachibana decided to invite him to the summer audition. Soon following, Yuki became a part of the Mankai Company.

He shares room 201 together with Tenma Sumeragi.