Ayane Hayabusa is a highly skilled kunoichi (female ninja) in the Ninja Gaiden series. As the adoptive sister of Ryu Hayabusa, she plays a key supporting role, often assisting him in his battles against demonic forces. Known for her swift movements, deadly ninjutsu, and purple hair, Ayane is both a fierce warrior and a complex character with a mysterious past. She is also a prominent character in the Dead or Alive fighting game series, adding to her popularity.