Начну по порядку:
1. A loud, working-class party girl or a shy musician who only seems to come alive when he is performing can both be Fairest.
Как перевести начало предложения?
2. "Fae realms". С географией Аркадии незнаком, но подозреваю, что это королевства Фей. Не ошибся?
3.Although some, mostly newly escaped, changelings are more focused on the details of physical appearance produced by differences in kith, most Lost come to understand that the differences between the kiths of a single seeming are more and less important than the similarities shared by all members of a single kith.
Здесь случаем не опечатка? Или действительно "more and less" , т.е. одновременно и более и менее?