Luna is Sailor Moon's Guide Cat. She is there to train Sailor Moon and the other Scouts. She gave the Scouts their Transformation Pens and Sailor Moon her locket. She gives the scouts their other items to aid them. She will in the future have a child with Artemis.

Artemis is the guide cat to Sailor Venus. He trained her to be Sailor V and then aided Luna when the Scouts where reunited. He was also Central Control. Also in the future he has a child with luna!

Diana is Chibi-Usa/Rini's Guide Cat from the Future. She is Luna and Artemis's Child. In the Picture she is the one on top of Luna and Artemis's Backs.