It's so hard to want to stay in character.... it's been said before but nearly EVERY SINGLE fanfiction out there with Ichika in it has adjusted him into a form that the writer is comfortable with. As over the top as some of them are, I prefer theirs, like DokuganRyu Ichika...
I mean seriously, an IS with a Hollow? It also projects itself as looking like Chifuyu as well? Freakin' awesome.
We are pretty much forced to break the 'rule' of keeping the MC believable in the scope of the canon original because we can't stand him. All that's left to do is to break that rule spectacularly.