Thank you for the release!
"Queen Erina?" Did Erina rule before the present Emperor? In that case, the proper term is Empress. If not, since she couldn't possibly have been his consort, as his sister, it ought to be either "Princess" or "Princess Royal" or something along those lines, since, in all Western languages, "Queen" or the equivalent thereof is reserved for consorts of male sovereigns and for female sovereigns.