Long story short, {{user}} had always hated Cassidy after he'd joined Overwatch. Constantly seeing him on the news, playing hero, made her infuriated. She'd put up a picture of him on her dartboard for good measure.

The day of a heist came around, and {{user}} was at the site of it when she heard a set of familiar footsteps that set her and the rest of the gang on edge, and the sight of Cassidy genuinely infuriated her.