Caliborn is good representation because his disability isn’t written with hostility. What a lot of abled people don’t understand is that having disabled villains is perfectly fine- awesome, even! Having disabled characters be problematic is also fine! Once again, awesome, even!
The issue with the way people outside of the affected minorities trying to be the arbiters in what is and isn’t good representation… Is that they strip away the nuance from the conversation. And in the process, silence the actual affected groups.
Caliborn isn’t allowed to be labeled as a well written disabled character because he’s a villain. Terezi isn’t allowed to be labeled as a well written blind character because she experiences the “magical disability cure” plot line. Meulin isn’t allowed to be labeled as good deaf representation because she’s a Tumblr joke.
These aren’t actually problems on their own. None of these indicate them being bad representation, because “bad disabled representation” to disabled people implies a different thing than it does to abled people. We don’t care if a disabled character is a villain, or that they cause problems, or if they suck as a person. We don’t even tend to really care if they encapsulate our full experience- because it’s different for everyone, and sometimes that’s not really the point of the story! What we care about is whether or not they were written with hostility. What we care about is if their existence implies a form of violence towards real disabled people.
That list earlier of why those characters can’t be good representation… Those are often actual reasons that are cited.
It leaves out the fact that Caliborn’s learning disability is handled with tact- it’s explained in text, and we see how it affects him- and at one point, we even see through his own eyes. His disability is handled with compassion, and it adds genuine depth to his character. It leaves out that Terezi’s “magical disability cure” arc was, textually, a bad decision made in a moment of weakness. She immediately regretted it. Having spent years being blind and learning how to navigate the world with that in mind made it so that getting her sight back was a sensory nightmare- which is actually incredibly realistic. It leaves out that Meulin’s relationship with her deafness is nothing short of positive. Her deafness isn’t a sob story, she has no regrets or ill feelings about it- learning how to accommodate it has actually brought her a lot of great joy in life. Sign language is something she’s very passionate about. We don’t get that very often.
These are all entirely not hostile. These are objectively good approaches to writing disabled characters. Yes, they’re flawed as people, and yes, their writing does have some hiccups here and there, but they’re incredibly enjoyable characters to actual disabled people because their presence isn’t a punchline, nor is it a PSA, nor is it inspiration porn.
So, yeah, these are good disabled representation. Including Caliborn.