Dark Mercury, who has also been referred to 由 the unofficial nicknames of Darkury 或者 Dark Sailor Mercury outside of the series, was the evil form of Sailor Mercury who appeared only in Pretty Guardian Sailor Moon. She first appeared in Act 21, after Sailor Mercury was kidnapped and brainwashed 由 Kunzite.
At first, she appeared like a normal, but 冷却器 Ami (dubbed "Akumi" (悪美; meaning "Evil Beauty") 由 the series production staff). But shortly thereafter she transformed into Dark Mercury, much to the horror of the other Sailor Senshi.
She was often disrespectful toward Kunzite and the other...