Character: Moon Knight
From: Marvel (Comics + Show)
Representation: Jewish, Dissociative Identity Disorder, Abuse Survivor, Autistic (Steven Grant), Latino (show only)
Their Importance: In superhero comics, an unfortunate recurring trope is that a character with a known mental illness or disorder will typically be a villainous character. Moon Knight is unique, then, for being a superhero with an explicit diagnosis of DID, having at least three distinct alters. While he will occasionally cross the line into being an "anti-hero", overall he's consistently portrayed as a noble and good person.
Many of the comics that feature Moon Knight provide an empathetic look at the experiences of someone with DID. The comics discuss difficulties with medications, with therapists, and Moon Knight's various struggles with how to manage his alters.
Moon Knight's Jewish identity isn't discussed as frequently but is still depicted as being very important to him. He is the son of a Rabbi and is shown to observe Jewish holidays. Additionally, Moon Knight practices a religion based on Egyptian mythology and discusses with other characters how being Jewish and practicing other religions is not mutually exclusive.
In the show, Oscar Isaac also stated that the alter Steven Grant is autistic, something that Isaac intentionally played in his portrayal of Steven. We get to learn more about Marc and Steven, and see them both in romantic interactions with Marc’s wife, Layla - who initially insists that Steven is Marc, but after learning about them having the disorder, acknowledges both Steven and Marc as their own individual selves. We get to see Steven and Marc becoming more of a cohesive unit and growing closer to each other, and by the end of the season, the two have excellent communication and are co-conscious with one another, and have accepted each other as important and needed parts of their system.
Issues: It's only been within the past decade that writers have finally settled on Moon Knight having specifically DID. In the decades preceding, much of the language discussing his disorder had been either outdated (like calling his disorder "Multiple Personality Disorder") or incorrect (such as conflating DID with schizophrenia despite them being completely separate disorders).
Additionally, how competently the subject of DID is handled depends on the creative team that's writing the character, often leading to many wildly different and occasionally unflattering approaches to the subject of disorders.
There is also another alter, Jake Lockley, who has at times been incorrectly portrayed or viewed as an “evil” alter, depending on the writer. It is unclear right now where a continuation of Moon Knight would go with his portrayal in the live action, but some fans have expressed concern on his introduction to the show, and how it could potentially add to negative stigmas about DID.
Also, just as a general note, episode 1x05 delves into their mother’s physical and emotional abuse, which is obviously very triggering for some people to watch.
Thanks to @silver-stargazing and anon for the write-up!