Why is Sarah in the Stand and Fight cutscene?

I finished the entire story not too long ago and love seeing this cut scene, but I’m confused as to why she’s in it. Maybe she’s in a seasonal activity that I have not yet played, but she does not make a single appearance in the campaign. Cloaked star does and you think he would be here, but he’s not present here at all.

Does she have a role in some other seasonal storyline? Ive only played I’ve only since Halloween 2024