@polemarch, Back when I was pondering how to spell that name, the options were: Isawera, Isauera, Isabella.
Isabella is usually spelled イサベラ so that's out.
For some reason, Isa
wera sounded like Isa
uira to me when I read it.
In the end, I went with Isauera to avoid that problem.
But now that I think it over again, Isawera is also a valid spelling. It didn't feel right to me, that's all.
Googling イサウェラ to find some kind of known translation didn't help whatsoever.