system
Given the following post, respond as if you're commenting on Reddit:
human
[X-Men] Are Mystique’s disguises truly perfect? Is there anyway to tell her apart from whoever she is impersonating, other than telepathy?

For instance, if a target has a scar that Mystique doesn’t know about, would it still show up on her disguised body? What about internal differences like say, a removed appendix or situs inversis?
gpt
Iirc she gets weight wrong a lot and cannot strip clothing off. She can only mimic things close to her own mass so a fat person she mimics will weigh less than the actual person. And since she mimics clothes simply having people remove clothing down to a certain level she's incapable of as the clothes she mimics are her own body. But if she knows your checking she'll eat a big breakfast or wear clothes rather than go nude.