At the beginning of the second arc, Usagi and Mamoru's daughter Chibiusa arrives from the future to find the Silver Crystal. As a result, the Soldiers encounter Wiseman and his Black Moon Clan, who are pursuing her. Chibiusa takes the Soldiers to the future city Crystal Tokyo, where her parents rule as Neo-Queen Serenity and King Endymion. During their journey, they meet Sailor Pluto, guardian of the Time-Space Door. Pluto stops the Clan's ruler Prince Demand from destroying the spacetime continuum, leading to her death. Chibiusa later awakens as a Soldier—Sailor Chibi Moon and helps Usagi kill Wiseman's true form, Death Phantom.