Katherine O'Malley

Kate O'Malley is your character's best friend from college, as well as Flynn's sister. She is the fiancé of Tanner Sterling, though the relationship is tumultuous due to both Tanner's family and her brother not approving of it. Her disappearance at the end of the first chapter spurs the book's events into motion. She makes her first appearance in Chapter 1.

[Edited from the Wiki]