During the events of "Avengers: Age of Ultron," Tony Stark (Robert Downey Jr.) decides to upload his artificial intelligence, J.A.R.V.I.S., into a synthetic body to create the superhero Vision (Paul Bettany). With J.A.R.V.I.S. now forever gone from the Iron Man suit, Tony is forced to replace him with another A.I. assistant named F.R.I.D.A.Y, which adopts a female Irish accent and is voiced by actor Kerry Condon.
Outside of "Age of Ultron," Condon provided the voice for F.R.I.D.A.Y. in several major MCU films like 'Captain America: Civil War," "Spider-Man: Homecoming," "Avengers: Infinity War," and "Avengers: Endgame." Because Kerry Condon only ever uses her voice in the MCU, you may not have recognized her in "Better Call Saul" as Stacey Ehrmentraut, the daughter-in-law of Mike Ehrmentraut (Jonathan Banks) and widow of his son Matt (Nicholas Liam King).
Both Mike and Stacey begin the series wracked with grief over the death of Mike's son, who was killed by crooked police officers in Philadelphia. Stacey eventually works through her grief with Mike's help, and he starts passing along the money he makes as an enforcer in Gustavo Fring's drug empire, hoping to create a better future for Stacey and his granddaughter, Kaylee (Abigail Zoe Lewis).