Mamoru Chiba was Prince Endymion in his past life, in order to regain his memories he must find the Millennium Silver Crystal, he starts off saving Sailor Moon from her enemies. Over time he falls in love with her, regains his memories, marries her, and have a child together, all while becoming King of Crystal Tokyo and Earth. It is because of his high intelligence he attends an elite high school, then goes off to medical school in the United States. Mamoru is a well-respected student, and the younger students admire him. He is also a very paternal character, taking care of Chibi-Usagi when she comes from the future to live with them. He also has the power of healing, has visions of the future, and he is connected to the Earth (if the Earth is sick, he is sick).