Fairies are both wicked and lovely.
Personally, I've never seen one, unless I mistook it for a butterfly. But the ones in this book couldn't be mistaken for anything: they are human size. They feel love, hate, regret ... very much like we do. And at this moment, they are feeling pain. There is a savage battle between Winter and Summer Fey that for some reason puts, Ash, a regular high school girl in the middle.
To be honest the Fey were given such a bad rep in the story, that I couldn't see them as anything other than an enemy. Even Donia, a sad and tortured Fey, couldn't get my sympathy. She was too passive. Instead, I concentrated on the on/off relationship between Ash and Seth, which sadly lacked depth as well.
Hopefully, the Fey are given better attention in the second book, Ink Exchange.