His specific species has something to do with candles they get power from them, and they can use them for whatever they want or just fire in general, giving them power or bending to their wim. candlewicks the start to some invasion, or he is someone who was banished and has found his why back and is hiding out as a fawn. words like demon, extraterrestrial, sprite, etc. Go through my head.

Wow, you are putting a lot of thought into these theories. Hope I don't disappoint.