Artemis is a fictional character from the anime series Bishoujo Senshi Sailor Moon. He is a white, talking cat with a crescent moon on his forehead, serving as a loyal advisor and companion to the Sailor Guardians. Primarily, he assists Sailor Venus, acting as her mentor and guiding her through her duties as a Guardian. Artemis possesses a wealth of knowledge about their mission and often provides important information to help the Guardians in their battles. His playful and caring nature adds a touch of humor and warmth to the series.