UFO Princess Valkyrie
English title: UFO Ultramaiden Valkyrie
Japanese title: 円盤皇女ワるきゅーレ
Alternative titles: UFO Princess Walkyure
Type: TV
Source: Manga
Episodes: 12
Status: Finished Airing
Aired: Jul 4, 2002 to Sep 19, 2002
Broadcast: Thursdays at 23:30 (JST)
Duration: 23 min per ep
Rating: R+ - Mild Nudity
Studios: TNK
Producers: Media Factory, Nippon Columbia, KlockWorx, Toshiba Entertainment, Omnibus Promotion
Licensors: ADV Films
Genres: Comedy, Sci-Fi, Ecchi

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)