She is the daughter of barry allen. Season 4 ended on one of the most memorable moments of all, with jessica parker kennedy's mystery girl finally revealing herself to be barry and iris' future daughter nora west. These suspicions were proven correct when kennedy's speedster character revealed herself to her family at the close of season 4, stating that her name was nora west.
Nora WestAllen Wiki The Flash Amino
While the show has slowly revealed details on the life of barry.
