The Xenian Flower

The Xenian Flower is the main antagonist of the Sailor Moon R movie. It is a parasitic flower from outer space. She is a parasitical flower that leeches onto a host and then deceives them into doing her bidding. She will then continue to feed off the planet she is on, spreading her dark energy in the process until the planet eventually is destroyed. She then waits for the next host to find her and repeats the cycle. Luna states that she is the most destructive life form in the universe, having destroyed countless inhabited worlds in the Milky Way Galaxy alone, and that it is ancient and infamous, having caused unspeakable destruction by the time of the Silver Millennium.

Fiore found her on the remains of a comet floating through space. Her seeds can turn into Flower Youma with a flying fairy-like form, a snake-like one or a humanoid form. Her base of operations is on an plant-shaped asteroid that turns into a field full of Flower Youma which initially look like ordinary flowers.