Keiti Kiiro

Keiti Kiiro is the Yellow Rainbow Princess, as well as their leader.

Rukasu Yamada
Keiti falls in love with Rukasu upon first seeing him, but she has no clue that he likes her back. She has a constant feeling that she's seen him once before, but because of her memory loss, she doesn't know where this feeling comes from.

Kyoko Aka
Kyoko is one of Keiti's best friends. They constantly clash, but in the end, they're always able to come to a mutual understanding, even without Renji's help. Part of Keiti's motivation for defeating Akumi comes from her discovery that she hides deep within Kyoko and her desire to free Kyoko from this "evil inside of her".

Renji Daidaiiro
Renji is one of Keiti's best friends. When Keiti and Kyoko, Renji is mostly the one to calm them down. She and Kyoko try to befriend Eimi because of Renji's crush on her.

Eimi Ichigomiya
Initially, Keiti is put off by Eimi’s behavior and doesn’t want much to do with her, not understanding why Renji has a crush on her. However, when Eimi’s status as the Orange Rainbow Princess is revealed, the two gradually begin to warm up to each other.

Shana Yogorenaki
Originally, Keiti and Shana tolerated each other, but after a while, an intense rivalry developed between the two because of their respective crushes on Rukasu.

Trivia

 * Keiti was originally going to be named "Katie Lolumiya".
 * Her name was, at some point, changed to Keiki, but it was soon changed back.