QUICKSILVER AND THE SCARLET WITCH
Wow, talk about issues.
But I guess if your mom leaves your dad before you’re born and then dies herself, leaving you in the hands of a cow-headed mutate who brings you to her mad-scientist master, who places you in stasis for a decade before then giving you to some gypsies, who are then murdered in front of you, right before this guy Magneto shows up and is real nice but then turns out to be a terrorist, you’d probably develop something of a creepy codependency for your sibling too.
They fought the good fight as Avengers, and tried to make normal lives for themselves. Pietro married an otherworldly princess, only to wreck it and piss off her whole family. Wanda married a robot and gave birth to fake children she made out of magic. And wait, in the middle of all that, it turned out that MAGNETO was their real dad?? Lordy! These two can’t get a break. Let’s just leave them alone, okay?