@Duine @ChristiJunior
And can create Polyjuice in 1st class.
Thanks, added. (although, I think she won't be high on the list.)
@ChristiJunior @Duine
I meant some particular acts.
And while Black widow is bad... Sorry.
I am writing down Cap arm-wrestling Thanos with... How many infinity stones he had there? 5???
Thinking about it, it seems I've done a pretty good job avoiding Mary Sue-infested fiction, because Rey is the main one who springs to mind, and everyone is already mentioning her.
Oh, but here's one: Supposedly non-superpowered 90 pound girl being able to effortlessly beat up muscle men twice her size (not just scrubs, but like trained guards, soldiers and fighters). Black Widow from the MCU is the obvious example.