I have seen what you're saying and I think I have an explanation for this. Obvious reason is that many of these TRAs are huge geeks (I don't mean this in a bad way, I'm a geek myself lol). This trans bullshit has infected geek fandom/culture (gaming & anime especiallly)and I'd say it's where you'll see the trans crap the most.

Now if we're talking about the TRAs who are actually trans-identified? My suspicion is that a lot of these TIMs see themselves as these anime characters. I feel like this has become much of a thing ever since mainstream gaming has went online and in the wake of avatar culture where you're able to create your own character. The most common example being Final Fantasy 14 where you see a large sizeable population of these TIMs. But aside from that, you also have the TRA TIMs who just simply latch onto their favorite female character and want so badly to be them which is what makes them fall into the delusion of thinking they can become them.

But that's just my own theory of course.