Valkyrie

ワるきゅーレ

The series' heroine and a princess from Planet Valhalla in the Dolphin Constellation. After Valkyrie discovered that her father intended to arrange a political marriage for her without her consent, she fled to Earth and crash-landed in Kazuto's bathhouse. To save his life, she was forced to give him half of her soul, a process that transformed her into an eight-year-old girl. She can only restore her normal form by kissing Kazuto, but the effect is temporary; she typically kisses him to protect him. She eventually develops deep romantic feelings for Kazuto. Her abilities include flight, energy manipulation, and defensive shields, and she wields an artifact known as the Key of Time. When it is later revealed that Kazuto is the one she is destined to marry, she is overjoyed, though the ceremony proves difficult because she keeps reverting to her child form. At the end of the third series, a mishap involving the Princess Mural causes Valkyrie's older and younger selves to split into two separate individuals. During the fourth season, Valkyrie's former classmates mistake her younger self for her daughter.