Tira

Tira was raised by a clan of assassins, who killed important people for the right price. The clan was called Bird of Passage. Since very young age Tira started killing people for her clan and eventually she became a cold-hearted killer.

But after the event with the Evil Seed the clan remained without their leaders and soon fell apart. Tira was adopted into a new family. Although it was an unusual environment for her Tira decided to accept living her new life. But one day she decided to free a pet bird of the family. She was scolded for this. Filled with anger she killed every member of her new family.

She now understood, that she could not live a normal life. Because she needed a leader in her life she decided to find Nightmare and become his servant. She later found out from Zasalamel, that Nightmare is just a puppet for the evil sword. Although she was disappointed, Tira decided to continue her search for him when the Azure Knight resurfaced.

After she found him, Nighmare accepted her as his servant and gave her two tasks: destroy Soul Calibur and find a new host for Soul Edge. To protect her Nighmare gave her his ravens. Tira managed to kidnap Sophitia's daughter to use as Soul Edge's new host. Using this as leverage over Sophitia she managed to use her to kill enemies of Soul Edge.

After Soul Calibut and Soul Edge clashed, Tira's mind was thorn appart, but she managed to survive because of her devotion to Soul Edge. Although she survived she now has dual personalities.

She later meets Astaroth and persuades him to join Nightmare.