A Ride into Fantasy for Valkyrie
Kazuto realizes that Valkyrie is not as strong as he thought and that the reason he can no longer connect with her from the heart is because he keeps seeing a shadow of an angel in Valkyrie.
Aired 19/09/2002EP 12 - A Ride into Fantasy for Valkyrie
2002
UFO Ultramaiden Valkyrie
UFO Princess Warukyure, aka UFO Princess Walkyrie is about a princess from outer space who accidentally crashes on earth, where Kazuto desperately tries to maintain the public bath of his grandfather. Due to circumstances, Kazuto receives part of princess Walkyrie's soul which forces her to stay there with him. But that's not the only problem ... because her soul lost strength, the princess transforms both mentally and physically into a little kid!
(Source: AniDB)