Isekai by Moonlight

[Aleh]

Well, the biggest one I noticed -- one that even made the tropes page (which I'm still looking through) -- is the "Ryou" vs. "Ryo" thing.

Ryou's canon name is 浦和良, or "うらわ りょう" to spell it out phonetically. "りょう," his given name, is transliterated as "Ryō" via Hepburn Romanization. Several English-lanuage sites -- especially those from the '90s given the technical limitations and limited understandings of the time -- subsequently dropped the diacritical from the "o."

The thing is, a direct Romanization of the name -- wapuro rōmaji, in other words -- produces an "ou" for that... and that particular Romanization is even authorized by the Japanese government for use in passports by the Japanese Foreign Ministry. "Ryou" is, accordingly, a perfectly valid spelling of his canonical name with English characters.

So, yeah, the "Ryo/Ryou" thing in the fic falls flat to anyone who actually speaks Japanese.

I'll probably remember a few more as I think about it, but that was the big one that stood out in my memory... which should give you a pretty good idea of why I refer to them as "quibbles."