Artemis is a white male cat hailing from the planet Mau, acting as guardian and advisor to Minako Aino, also known as Sailor Venus. A yellow crescent moon symbol marks his forehead, signifying his ties to the Moon Kingdom. He and Luna were sent to Earth by Queen Serenity via the Silver Crystal following the Silver Millennium’s collapse, tasked with awakening and guiding the Sailor Guardians.
During crises, Artemis can temporarily transform into a humanoid form, retaining his green eyes and crescent moon symbol. This form features pale skin, long white hair, and crescent-detailed attire, including a necklace and patterned shirt. In the Dream arc, he employs this ability to rescue Minako from falling off a crane during a clash with the Amazoness Quartet. His bond with Minako proves crucial to her growth, offering emotional support and facilitating her evolution into Super Sailor Venus by granting her the Venus Crystal, tied to their shared connection.
Artemis’ dynamic with Luna shifts across adaptations. Initially critical and sarcastic in the manga Codename: Sailor V, their partnership strengthens over time, leading to marriage in the future and a daughter, Diana, who becomes Chibiusa’s advisor. While the manga briefly hints at romantic tension between Artemis and Minako—such as a moment where he grows flustered after glimpsing her in the shower—his enduring devotion stays fixed on Luna.
The Sailor Moon Crystal adaptation introduces his human form in the Eternal arc, mirroring manga depictions. The Cosmos installment expands on his origins from Mau. Across versions, Artemis balances mentorship with comedic missteps, like deactivating Minako’s alarm clock to her detriment. His critical yet encouraging nature contrasts Luna’s sternness, though both remain dedicated to safeguarding the Sailor Guardians.
Non-manga portrayals, such as the live-action Pretty Guardian Sailor Moon, present Artemis as a plush toy while preserving his advisory role. The original anime amplifies his emotional vulnerability and occasional clumsiness, showcasing guilt over mistakes and attempts to uplift Minako during hardships. These iterations diverge from the manga’s restrained tone but uphold his essence as a loyal protector.
Artemis’ name references the Greek goddess of the moon and hunting, a connection Minako jokes about in Codename: Sailor V. Regional dubs occasionally modify his gender or name, though such changes lack consistency.