Fiore

Fiore is one of the main antagonists of Sailor Moon R: The Movie (which includes "The Promise of the Rose" in the English dub's title), the other being the Xenian Flower. "Fiore" is Italian for "flower", but his name is pronounced like the plural form "fiori". He was a lonely alien who took great strength from his friendship with Mamoru Chiba (Darien in English) and spent many years looking for a flower for him, as promised, since Mamoru gave him a rose before he vanished, much to Mamoru's sorrow. He vanished because he found the Earth's atmosphere unacceptable. This quest for a flower put him in the path of the Xenian Flower, which caused a thought to strike him, and he changed into a bad guy, seeing the Sailor Scouts as the negative forces.

While Fiore was trying to take Sailor Moon's crystal, she showed him how Mamoru became her friend (as Usagi [or "Serena" in the English dub]) when she was a little girl. This caused the crystal to change, and Fiore to feel remorse and hesitate to take the crystal, much to the Xenian Flower's dismay.

At the end, when Sailor Moon is dead, Fiore gives Mamoru his own life: the Friendship Flower, whose nectar he tells him to give to Sailor Moon. He then goes away.