A talking cat serving as the Guardians' mentor and strategist, providing crucial information and technological support while maintaining a connection to the moon.

A supporting character and Usagi’s love interest, who leads a double life as a masked figure romantically entangled with Sailor Moon, pursuing the Silver Crystal to regain lost memories.

The first Guardian discovered by Sailor Moon, noted for her exceptional intellect and analytical skills, which she uses to support the team's missions.

The second Guardian discovered, known for her spiritual abilities and serious demeanor, which she uses for protection and guidance within the group.

The third Guardian, characterized by her physical strength and protective nature, who balances her past vulnerabilities with her role as a loyal and powerful team member.

The main antagonist and former sorcerer, driven by a desire for control and manipulated by the more powerful Queen Metalia in her pursuit to gain the Silver Crystal.