Black Lady was determined to destroy everything and everyone because she was angry at the world for not loving her. She was the most powerful of Wise Man's minions, and was quite merciless. Black Lady used Luna P in combination with the dark power for a variety of attacks.

Black Lady eventually realised the truth that she is loved and reverted back to being Chibi Usa, who helped Sailor Moon / Neo-Queen Serenity defeat Wise Man in the end.