This one is going to be a little different, because I want to talk about a character who actually (gasp) canonically has a mental illness. So: your fave (Gert Yorkes, played by Ariela Barer) has clinical anxiety.
(This isn’t addressed in the comics, to my recollection; I haven’t read the new run or past the first writer-handoff in the original run. I’m just going to be addressing specifically her portrayal in the show Runaways, which — I’m just going to say this real quick — I think is the most consistent Marvel TV show and also the most successfully diverse one. I’m a big fan of it, even though it’s not a very direct adaptation.)
We first learn of Gert’s anxiety in 1.03, when she suggests to her adopted sister Molly (Allegra Acosta) that the strange things happening to her are possibly panic attacks, like she herself started getting around Molly’s age. So okay, cool, canonical confirmation of panic attacks. Specific verbal confirmation, even, not just a character obviously having a panic attack that isn’t ever addressed as such. (I’m looking at you, Agents of SHIELD 4.08 with Daisy yeeting herself into the sky out of anxiety and 6.06 with Jemma literally clutching a pillow and hyperventilating while her fear monster manifests.) Specific verbal confirmation of panic attacks, i.e. anxiety disorder, is awesome. That doesn’t happen very often. But I kind of just assumed when it was first brought up that it would be handled in the way that such things usually are in television: it’d be mentioned once and from then on the viewer would have to apply it to Gert’s characterization if they remembered.
Full story here.