Rukasu Yamada

Rukasu is Keiti's love interest and a Rainbow Knight.

Trivia

 * His original name was first Jim, then Rukasu Hoshida.
 * He was also originally planned to die toward the beginning of the series and be revived later. Although this idea was scrapped, the creator has considered having this situation or something similar happening to him toward the end of Colorful Rainbow's second arc.