Sailor Moon Crystal Episode 9 English Dubbed Episode Title:Serenity -Princess-.Episode Description:In his dying moments, Mamoru comes to realize that his true identity is Endymion. Usagi's sorrow over Mamoru's death transforms her into the true Serenity. She regains memories of her past life in the process and shows how she fell in love with Endymion despite their being laws against people from the Earth and Moon seeing each other. When the Earth Kingdom attacked Silver Millennium, Endymion sacrificed himself to protect Serenity. Usagi's tears bring forth the Legendary Silver Crystal and that power drips into Mamoru's body. Queen Beryl arrives, and she and Kunzite take Mamoru back to the Dark Kingdom. Afterwards, Minako reveals she is the true leader of the Sailor Guardians, while Artemis shows the other Sailor Guardians their past lives. In order to locate the Dark Kingdom where Mamoru is being held, all of the Sailor Guardians decide to travel to the Moon and learn the whole truth.