Luna is a black guardian cat who helps look after the Sailor Scouts, and lives with Serena/Sailor Moon. She often is a mentor to Sailor Moon, and often disciplines or keeps her in line whenever she's not doing what she's supposed to do or slacking off. In the original dub and this fandub, she has a British accent that could be considered posh, or somewhat posh.

*She is marked as a senior under Age because of her voice, even though she may be much younger than she may sound.