Princess Serenity and Black Lady

Sailor Mercury (セーラーマーキュリー Sērā Mākyurī?), in Japan, is one of the central characters in the Sailor Moon metaseries. Her real name is Ami Mizuno (水野 亜美 Mizuno Ami?, или Amy Mizuno the English versions), a genius schoolgirl who can transform into one of the series' specialized heroines, the Sailor Senshi.
Sailor Mercury is the first member of the Sailor Senshi to be discovered by Sailor Moon, and serves as the "brains" of the group. Her powers are associated with phases of water, and she can use her supercomputer to quickly analyze a foe in battle.
Aside from the...