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- This page is about the cat. For the unused fairy character, please see Diana the Moon Fairy.
In the manga, Tin Nyanko says they are creatures from the planet Mau. This is never mentioned in the anime. Also never mentioned in the anime is that Diana, along with her parents, Artemis and Luna, can take human forms due to Sailor Moon's power. In her human form, Diana's hair and most of her body resembles Chibi Chibi's.
Diana's name is a variation of her father's name, Artemis. Artemis is named after the Greek Goddess of the hunt and the moon, and its Roman equivalent is "Diana".