Well, it’s also referenced in The Shadowhunter Academy, I haven’t read it yet, but I was told by my friend who got really excited about it. It was something about how “Raphael has never loved in that way” Please, correct me if I am wrong though. Raphael has just alway been aroace in my head. Also, I look at authors’ social media stuff as canon, but you’re right, that’s just me. (And I agree, Jughead is in this case the “more real” erasure, but Raphael counts for me too)
I’m not sure I read that book in particular (I only read 5 of them and then I deleted everything from my brain) but from what I know there’s no real aroace rep in them. The thing is that CC is known for her shitty treatment of lgbtq+ characters in general so I think that whatever there was there about Raphael wasn’t actually meant to say anything about his sexual/romantic orientation (although can still be interpreted as such of course) and I’m pretty sure when she said “aroace” she didn’t actually know what that word meant either. (Also omg about the “never loved that way” part: in the show when Raphael talks about his feelings for Izzy he keeps emphasizing how he hasn’t felt that way in a really long time which I took to mean ‘never’ or not since like 60 years ago or something so that’s why I see him as demiromantic but again, that’s just my interpretation of it).
Also I don’t think that her tweets were even the reason the show writers decided to do this in the first place, I think it was mostly because of the fans who kept tweeting @ them and asking about the possibility of asexual Raphael. So unlike CC they actually went and did research on asexuality (like, they actually spoke to ppl from GLAAD) and even tho their ace rep didn’t come out perfect it’s still more and much better than what CC ever did. So I mean I totally understand ppl who are mad that Raphael isn’t aro because all this time I saw him as aroace too but it’s still not something I personally would really hold against the show writers because again, they didn’t really have any canon material to work with so idk