Luna | Artemis | DianaLuna is a female black cat (despite looking dark blue), who was first to find Sailor Moon and reunite Sailor Mercury, Mars, and Jupiter.
Artemis on the other hand, found Sailor V, who is now known as Sailor Venus. Both are loyal and guardian cats to the Sailor Senshi and Queen Serenity.
Diana is their future daughter who lives in the 30th Century with Small Lady, however travels back to the 20th century during the SuperS Season. Diana loves to sit on peoples' head and replaces Luna P in the series.