Sailor Mercury/Ami Mizuno

Dark Mercury, who has also been referred to by the unofficial nicknames of Darkury or 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 by Kunzite.
At first, she appeared like a normal, but cooler Ami (dubbed "Akumi" (悪美; meaning "Evil Beauty") by 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...