Chris Smith a.k.a. Peacemaker visits Canterlot City as he hears news about news reports of violence which most of the suspects are students from Canterlot High School.

When Peacemaker prepares himself to take down those soon-to-be dead Criminals, He notices a truck passed him by as he caught a glimpse of a bacon-haired girl, both unconscience and tied up. So Peacemaker followed the truck.

As he arrived, Peacemaker witness the girls was brutally beaten by 30 students which Peacemaker killed them with no difficulty.

When Sunset wakes up and sees Peacemaker carrying her bridal style to the hospital, She explains the whole Anon-A-Miss fiasco which causes the series of violence which Peacemaker saw in the news as she was framed for posting secrets as her friends abandoned her.

It's up to Peacemaker as he will do what it takes to clear Sunset's name the same way as he did to do what it takes the bring peace.

Kind of jumping the shark by having Peacemaker kill all those students right off the bat, even though it could be entirely within what Peacemaker would do. What use is there for Sunset to clear her name of Anon-A-Miss when the Canterlot High is likely going to close down after this massacre, even if they maybe deserved it? The rest of the students are likely going to hate Peacemaker and by extension Sunset for these deaths way more than for any petty high school cyberbullying BS.

If you do want Peacemaker to kill the students, maybe have this be a point of no return where Sunset leaves with Peacemaker and wants to become a super hero(?) like him. Being saved by an extremist when everyone else abandoned her and she was attacked could cause her to be radicalized and believe in Peacemaker's definition of justice.

Either way, this could be used as the starting point to get Sunset involved with the wider DC comics setting instead of just resolving the Anon-A-Miss issue. Like, here's a continuation of the prompt:

Seeing that Sunset is going off the deep end not wanting anyone to die over their actions, the CMC confess but it isn't enough to dissuade Sunset from leaving. From here the CMC and the Rainbooms have to try to find some reason for Sunset to want to stay and to stop her from leaving with a super "hero".

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I would love to see an interaction scene between the Rainbooms,The CMC Sunset and Peacemaker.