(DOATEC)'s Super Human Development Project, who use her genes to create a clone called Kasumi Alpha as part of its project to develop supersoldiers. In Dead or Alive 2, Kasumi escapes, defeats her clone and attempts to return to her village; but she is banished because a dishonored shinobi cannot rejoin their clan. She is labeled a traitor because leaving the village without permission is punishable by death, and she is constantly hunted by assassins including her half-sister Ayane. Despite this, she still wishes to see Hayate now the clan's leader and Ayane. In Dead or Alive 3, she enters the third tournament to meet them for the last time. She meets her brother again in Dead or Alive 4, and after trying to persuade him to not launch an assault DOATEC and return to the Mugen Tenshin village with her, she is attacked by Ayane, but is victorious. Kasumi follows Hayate to the DOATEC Tri-Tower to confront Helena Douglas, who has taken control of DOATEC. Kasumi fights her way past Helena and heads for the laboratory to destroy her powerful clone, the upgraded Alpha-152. Kasumi fights to the best of her ability, but Alpha-152 escapes in the chaos caused by a Mugen Tenshin attack. Upon spotting Helena entering the blazing helipad, Kasumi risks her life trying to intervene, but Ayane stops her and saves her life seconds before the building explodes. Kasumi returns in Dead or Alive 5, where due to her status as a runaway, she is still unable to return to her village. She still lives on the run and continues to be a target. Kasumi joins forces with Helena to find Alpha-152, refusing help from other characters, including her brother. After defeating her clone, she is attacked and killed by Hayate and Ayane. However, it is revealed that Kasumi that was defeated was an Alpha clone programmed to believe she is the original, while the real Kasumi is in Japan within Ninja Gaidens Muramasa hidden village. Kasumi receives a message from the ninja master Ryu Hayabusa, telling her that Hayate is in danger and she is needed in battle once again. After fighting several contenders, she eventually reaches the oil platform where her brother is located, and discovers a secret laboratory belonging to Victor Donovan's new organization, MIST. Kasumi finds that he has created several Alpha clones to sell to the militaries of powerful countries. She