Luna is Sailor Moon's Guide Cat. She is there to train Sailor Moon and the other Senshi. She gave the Senshi their Transformation Pens and Sailor Moon her locket.
Artemis
Artemis is the guide cat to Sailor Venus. He trained her to be Sailor V and then aided Luna when the Senshi where reunited.
Diana
Diana is Chibi-Usa's Guide Cat from the Future. She is Luna and Artemis's Child. She is the grey cat
