Is this something you've made up for TNH's own Marvel universe, or are you drawing from the comics? Because there IS a period in late 60s Avengers where the twins ran off back to Magneto for a time after Wanda got hit by a bullet secretly directed by Magneto himself and Quicksilver sperged out about it, but that was far from a willing reunion or return to Evil Mutantry and also happened well before the Dark Phoenix Saga in the 616 timeline.
I think I accidentally pushed them leaving later in the timeline. Trying to correlate Avengers and X-Men timelines that early in Marvel history is a pain in the ass.
Some things aren't exact since The Age of Heroes has only been going on for about a decade.
Chapter 1 starts during the mid 2000s.
She-Hulk gained her powers about a month before Chapter 1.
Iron Man and The Punisher got their PTSD probably during the Gulf War.
Spiderman's Clone Saga is happening concurrently with Chapter 1 of TNH.
Xavier meeting Storm and the Shadow King happened in the late 70s to both line up with Xavier's world traveling before establishing the school and for Storm to be in her 30s as desired by Ron and Mad.
My mistake. I use the name of the character "Dazzler" as she is named in my country, not in the USA.
Then what is Crystal's name?