Here's a breakdown:
* Identity: Mamoru Chiba is a seemingly ordinary high school student who is actually the reincarnation of Prince Endymion, the prince of the Silver Millennium (the Moon Kingdom in a past era).
* Powers: He is bestowed with the power of the Silver Crystal and is able to transform into Tuxedo Mask, a masked hero clad in a tuxedo.
* Abilities: While not as powerful as the Sailor Scouts, Tuxedo Mask possesses enhanced strength, agility, and the ability to use a magical rose to fight. He also has a psychic connection to Sailor Moon, his past life's love.
* Role: Tuxedo Mask is a key ally to the Sailor Scouts, often providing vital assistance during battles. He also acts as a source of emotional support for Sailor Moon, especially when she's struggling with her identity or her powers.
* Relationship: Tuxedo Mask is deeply in love with Sailor Moon, and their relationship is a major driving force in the series. In his civilian identity, Mamoru is initially unaware of Sailor Moon's true identity.
Tuxedo Mask is a beloved character, known for his charming personality, his strong sense of justice, and his unwavering devotion to Sailor Moon.