Yuki Kiiro

Yuki Kiiro is the former Yellow Rainbow Princess (currently the Yellow Rainbow Queen) and Keiti and Seira's mother.

Background
Yuki was abandoned by her parents as a child, and as a result, she was living on the streets until she was found by the Yellow Rainbow King. At this time, the Yellow Rainbow Queen and the unborn Yellow Rainbow Princess had been killed, so he was depressed and had come to Earth to get his mind off of the situation; he felt that Yuki could fill the hole in his heart and the heir position that the loss left, so despite the objections of others, he decided to adopt her. She ended up becoming great friends with Naoki, Akane, and Mikan during her lifetime. The first war against the Shadow Kingdom began when she was a teenager, and she wanted to do something to turn the tides in the hopeless war. Fortunately, she ended up discovering spells that could cause harm to the Shadow Creatures sent out by Akumi without the risk of Shadow Sickness; unfortunately, only heirs to the throne could perform these spells, and they had to be sealed in an object of the same color. Even so, the heirs to the thrones of the Rainbow Kingdom - all of them at the time female - managed to defeat Akumi and bring an end to the war. Yuki later ended up marrying Naoki and having Keiti and Seira.