地場衛
Usagi has a boyfriend named Mamoru Chiba (also known as Tuxedo Mask). Mamoru and Usagi's relationship is a significant part of Usagi's personal life, as well as the series as a whole. Mamoru and Usagi date for a long time in the series and the love they share helps her through many challenges. In the anime adaptation, Mamoru gives Usagi a heart-shaped promise ring just before he leaves for America. The ring represents a promise to Usagi that they will eventually marry.