Princess Snow Kaguya

Princess Snow Kaguya is the main antagonist in the Sailor Moon S movie, Hearts in Ice. She is an icy alien who freezes planets for her collection. She is voiced by Linda Ballantyne in the original dub and Melissa Fahn in the redub.

Biography
Kaguya previously tried to freeze Earth, which she wanted in her collection the most, but was banished by means of the Silver Crystal.

Many years later, she traveled on an icy comet and returned to Earth. She began her freezing of Earth by bringing winter and sending her Snow Dancers to invade, searching for a missing piece of her comet which had been discovered by a scientist, Kakeru Ozora, and was draining his life force.

Eventually, Kaguya appeared before Kakeru, and he thought she was the real Princess Kaguya from the fairy tale. She took the comet shard and threw it into the ocean, beginning the process of freezing Earth, while continuing to drain Kakeru's life energy. Sailor Uranus, Sailor Neptune, and Sailor Pluto fought her, and eventually the other Sailor Scouts/Sailor Guardians arrived.

After a fight, in which Kaguya gained the upper hand, Sailor Moon transformed into Super Sailor Moon, but Kaguya easily countered her Rainbow Moon Heartache, so she decided to use the Silver Crystal instead. As Kaguya powered up for a final attack that would obliterate the Sailor Guardians, Tuxedo Mask held off the Snow Dancers while all nine Sailor Guardians combined their power for a Silver Crystal Power attack, entering a beam struggle with Kaguya. Though Kaguya initially had the upper hand even here, the Sailor Guardians were eventually able to overpower Kaguya, destroying her and the remainder of her Snow Dancers.

Trivia

 * She is based off Princess Kaguya from the Japanese fairy tale, The Tale of the Bamboo Cutter (despite the fairy tale Kaguya being the protagonist). Other anime villains based off her would follow in Inuyasha and Naruto.
 * She is also based off the Snow Queen, as an evil humanoid made of ice who intends to freeze the world, and looks similar to both animated depictions of the character.