In the manga, Eternal Sailor Moon uses the Silver Moon Crystal, an evolved form of the Silver Crystal, to carry out her attacks.   is a past incarnation of Sailor Moon that lived in the Moon Kingdom during the age of Silver Millennium. She was the daughter of Queen Serenity, who ruled Silver Millennium and watched over the Earth. Princess Serenity's guardians and closest friends were Sailor Mercury, Sailor Mars, Sailor Jupiter, and Sailor Venus, who were princesses of their own respective planets that sometimes lived on the Moon. On one of her visits to Earth, she met and fell in love with Endymion, the crown prince of Earth. During the attack that caused the Moon Kingdom's downfall, Prince Endymion died protecting Serenity. In the manga she then commits suicide out of grief, while in the anime Queen Metallia killed them both. Serenity's mother, the Queen, was able to seal away the evil that had created the attack, but everyone involved was killed. Before her own death, the Queen used the Silver Crystal to give her daughter (and others) another chance at life, hoping that Serenity and Endymion would be able to find happiness together in their new lives. In the live-action series, it is Princess Serenity herself who destroys the Moon Kingdom when Endymion was killed during the war. Serenity reincarnates as Usagi Tsukino in the 20th century. Usagi occasionally takes the form of Princess Serenity during the series, often at climactic moments when more strength is needed than Sailor Moon can usually access. Usagi discovers her identity as a princess in act 9 of the manga, episode 34 of the anime, and act 25 of the live-action series. While Takeuchi draws Usagi with white, yellow, and even pink hair, Serenity almost always has white hair. In the anime, both characters are always blond. In the live-action series, Serenity has black hair and brown eyes, just like Usagi, and she wears her hair straight down rather than in pigtails. This makes her identity more ambiguous before the storyline reveals her to be Usagi. At climactic moments, Serenity sometimes gains a pair of functioning angelic wings. She does this during the final battles of "SuperS", after she jumps off a tower to save Chibiusa and the two of them collide with Pegasus while falling. It also happens in "Sailor Stars" during the fight with the fully possessed Galaxia when she grabs the Sword of Sealing.