The Bird of Passage was the European assassin organization, established in 1300, that Tira originally belonged to. The organization operated under a strict code of silence. According to Tira's Soulcalibur III biography, the Bird of Passag e was responsible for many notorious murders of prestigious figures and officials, and from its safe position in the shadows, it influenced the history of medieval Europe. It had no particular affiliation and favored no side, forming contracts with the rich and powerful.