
Darien is a dashing blue-eyed young man who is tall, dark and handsome. He attracts the attention of many women during the series. His chief love interest for a large period of the anime and manga is the clumsy, complaining Serena (Usagi). She gives Darien the pet name Mamochan in the Japanese series. Several others girls like Raye (Rei) were infatuated with him. In one case the space alien Anne (Ann) fell for Darien! His best friend is Andrew (Motoki), the apron-wearing supporting character who haunts the neighborhood arcade.
Before the present incarnation of Darien lies his troubled, mysterious past. At the age of six, he loses his memory and both his parents in an automobile accident. He learns from premonitions that he must find an artifact of immense power called the Imperial Silver Crystal. Originally Prince Darien (Prince Endymion), he is reborn a thousand years later in our current time. During his career he is overcome by the evil forces of the Negaverse. His mind then becomes the property of Queen Beryl who uses him for her own twisted purposes. After Beryl is defeated by Sailor Moon, all references to the Moon Kingdom and their heroic roles are eliminated from the minds of all the participants. The Moonlight Knight (Tsukikage no Kishi) appears. Actually a manifestation of the latent fighting power in Darien as well as his love for Serena, the Moonlight Knight fills in the void left by the missing Tuxedo Mask. Eventually all wrongs are made right again and our hero is totally restored.
In the beginning of the series, Serena found Darien to be an irritating individual. He gave her the nickname "Meatball Head" ("Odango Atama" a Japanese dessert). Darien was always teasing her, making her loath the name. Eventually they bond and became closer (as they are meant to be), realizing their love for each other when they learn of their shared past in the Moon Kingdom. Darien's love for Serena became so strong that he would disregard his personal safety when rushing to save her. He did this on four occasions, (clinically) dying in two of those cases. They eventually marry, but the ceremony was never shown on the American television series.