Diana is a small, grey kitten who serves as the guardian and advisor to Chibiusa in the anime series Bishoujo Senshi Sailor Moon. She is the daughter of Luna and Artemis, two other guardian cats. Diana is intelligent, polite, and highly knowledgeable about the world of the Sailor Guardians. She often provides crucial guidance and support to the team, especially Chibiusa, helping her grow as a Sailor Guardian. Her gentle and caring nature makes her a beloved companion.