F.R.I.D.A.Y. is a natural-language user interface created by Tony Stark, designed to work with his Iron Man armor. She served as Stark's main user interface computer system during the final battle between the Avengers and Ultron in Sokoviaand to find information about Helmut Zemo. In contrast to J.A.R.V.I.S.'s voice code which was patterned after a male English accent, F.R.I.D.A.Y.'s is patterned after a female Irishone.
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