Jessica Parker Kennedy’s Nora West-Allen joined The Flash in Season 4, appearing first as a mystery waitress at Barry and Iris’ wedding.
Naturally, as Barry and Iris’ future daughter, there’s hope that we’ll see her again at some point down the line.
She interacted with the characters at several points throughout the season before being revealed as Barry and Iris’ future daughter at the end of the Season 4 finale.
After destroying Cicada’s dagger and setting off a chain of events that rewrote the timeline, Nora chose to take responsibility for her actions and opted to disappear from existence rather than tap into the negative speed force.