Thank you <3
I'm honored to see psychology majors playing this game as I'm just writing from experience and as much research as I could do without having studied psychology.
With Michael the reason was that I'm really tired of OCD being represented as "funny handwashing quirk" and as someone with violent OCD I don't think it gets talked enough as much as it should. Michael is obviously a very extreme case due to the lack of previous treatment and very bad circumstances, but the intent is still to potray him in a sympathetic light, just like the others, and maybe even more so since it's an issue that I've personally struggled with.
I also think trigger warnings are a necessity, especially in a game like this.