Uranus

ウラヌス

Uranus is the angelic yet intensely power-hungry second-in-command of the Secret Society, a criminal organization. Although she served the group's leader, Master, without question, Uranus had sought to overthrow her and become the new head of the organization. Before joining the Secret Society, Uranus was an ordinary woman and the girlfriend of Duke B. Rambert.
When she discovered that Gaia, one of her co-workers, had hosted the first Toshinden tournament behind the Secret Society's back to start a rebellion, she declared him a traitor and marked him for death. However, Gaia escaped and went into hiding. Uranus then sent him an invitation to the second tournament in an attempt to lure him out. Although Gaia did indeed enter, Uranus was eventually killed, along with Master, by him and the rest of the fighters he had aligned himself with during the tournament.
During the events of the fourth tournament, a girl named Puella Marionette carries Uranus' bow, and it is strongly implied that Uranus was her mother.