Sisters are named after minerals kermesite, berthierite, petzite and calaverite. The Boule Brothers do not follow this pattern; instead, they are named after the scientific terms chirality and achirality. However, the term 'boule' (sounded out in katakana) is accompanied by the kanji '人造宝石', literally meaning a "man-made gemstone"; synthetic/artificial gemstones; and the English term 'boule' means "A single crystal ingot produced by synthetic means". Key figures Prince Demand is the leader of Planet Nemesis in the 30th century. He is the older brother of Saphir. Because of the Black Moon Clan's beliefs that the Legendary Silver Crystal is a corruptive force, Wiseman sought Demand out and convinced him to use the Malefic Black Crystal's power against Crystal Tokyo. Demand and his allies initially plan to use the Black Crystal's time manipulative powers to travel back in time to the 20th century as part of "Operation: Replay", intending kill the past versions of the "White Moon" members who established Crystal Tokyo: The Sailor Guardians and Mamoru. But Demand, wanting to see the Legendary Silver Crystal's power for himself, launched an attack that wiped out most of Crystal Tokyo in a display of power. It resulted with Demand encountering Neo-Queen Serenity as she rushed out of the Crystal Palace in search of her daughter, Chibiusa. This led to Demand becoming obsessed with Neo-Queen Serenity, which extended to her past self Usagi Tsukino as he abducted her during her visit to the 30th century. Demand intends to force Usagi to submit to him, but she eventually manages to escape. Demand later turns on Wiseman upon realizing that he used him and the rest of the Black Moon Clan, and is forced to kill Saphir as his brother is under Wiseman's spell. Demand then steals the Silver Crystal of the present from Usagi and the one of the future from Black Lady, and attempts to bring them together to destroy the time-space continuum. But Sailor Pluto uses her forbidden Time Stop attack and prevent, with Demand attacking Usagi before she and Tuxedo Mask combine their powers to destroy him. In the first anime adaptation, Demand has a similar story, with some differences. He initially intends to reason with Neo-Queen Serenity, explaining that he and his people are descendants of criminals, not criminals themselves. It is Wiseman, and not Demand himself, who kills Saphir, because the latter told his older brother that Wiseman has been