Previous Story:
Ayane is a ninja assassin who has a vendetta with Kasumi, her half-sister (same mother, different father). She joined the "DOA2 World Tournament" in pursuit of Kasumi, who was then a runaway Shinobi. Ayane's knowledge of Magic Spell has given her the nickname "Female Tengu of the Miyama".

DOA3 Story:
Ayane's former teacher and foster parent, the leader of Mugen Tenshin Hajinmon clan, has disappeared. His name is Genra. Ayane, now the most powerful Shinobi in Hajinmon, learns that Genra has been turned into a puppet by DOATEC and its dastardly Project Omega. Seeing what has become of Genra, her beloved father figure, Ayane realises that fate commands her to put Genra out of his misery.