UFO Ultramaiden Valkyrie (円盤皇女ワるきゅーレ, Yūfō Purinsesu Warukyūre) is a Japanese manga series created by Kaishaku.

All episodes and the OVA special were dubbed in English and initially released on single DVD volumes in North America by ADV Films from 2006 to 2007.

That alone might have made things hard enough for him, but an alien princess named Valkyrie destroys the bathhouse, and in the process mortally wounds Kazuto.

The manga series UFO Princess Valkyrie (円盤皇女（ユーフォープリンセス）ワるきゅーレ, Yūfō Purinsesu Warukyūre) was published in Japan by Square Enix in the magazine Monthly Shōnen Gangan beginning in 2002 and continuing for eleven volumes, ending in 2007.

[4] ADV Films originally licensed UFO Ultramaiden for North American release and oversaw the English translation and production on all TV and OVA episodes of the series.

[7] The reviews range from "D−" for the story which was mainly aimed at the subtle predator themes relating to Kazuto and Valkyrie's relationship, to "B" for the art and music.

An article on the series, as well as reviews by Kevin Gifford on several of the volumes, appeared in the North American version of Newtype magazine.

[29] The Anime Network online video streaming web page lists the first and second TV seasons and the OVA special.