Akane Aka

Akane Aka is the former Red Rainbow Princess and Kyoko's mother. She used to have Akumi sealed inside of her, but she was accidentally transferred to inside of Kyoko's body upon her birth.

Background
Akane was a rebellious tomboy as a child. She was the only heir to the Red Throne, as her mother became unable to have children after she had her, but she would often sneak away from her duties and train with the Rainbow Knight Force. As a result, she became very skilled with a sword. During one training session, she met a clumsy new recruit, Takahiro, and gave him extra training with the sword; over time, Akane and Takahiro started to fall in love. When the Rainbow War began and Yuki discovered a countermeasure against the Shadow Creatures, Akane initially refused to participate in the war as a Rainbow Princess, as that would require her to use a weapon other than her sword; however, after a special spell was cast on her sword to ensure that it would have the same effect on a Shadow Creature as a red weapon would, she agrees to join the fight as a princess. At the end of the war, Akane prepares to finish Akumi off by stabbing her in the heart with her sword, but at the last minute, Akumi uses the last of her strength to move a little bit out of the way, causing Akane to accidentally stab her in the uterus instead. As a side effect of the spell cast on the sword, Akumi is sealed in Akane's uterus. Years later, Akane and Takahiro marry and try many times to have a child, but because of Akumi, each attempt ends in a miscarriage. Eventually, Akane and Takahiro decide to try one more time before they give up, and this time, they are able to give birth to a healthy baby girl - Kyoko. However, little do they know, Akumi has been transferred to Kyoko's body....