"Instilled with magical properties by many societies, fire is a natural element to assign faery phenomena. Pagan Holy Days such as Midsummer's Eve and Samain were renowned for fairy attentions, as they gathered around ceremonial flames. Hearths, in particular, served as homes for numerous types of faeries. Bringing wealth and gifts to their masters, they are excellent workers in farmyards, workshops, kennels, or stables. Should you be so lucky as to have one residing in your home, take care to provide prompt and proper gratitude. Fire spirits reflect the volatile nature of their element and can become quite hostile when they feel slighted."
Coppied from
http://thefae.freeservers.com/Usually Fire Fae are EXTRA mischievous, and for a Fae that's pretty bad... If you have a Fire Fae allies, then make sure you keep up with your thank yous and gifts. Be careful though, if you offer them gifts just because they get a little mad to calm them down, then they will get mad more often to get more gifts. It's a bad cycle to get into and EXTREMLY hard to break without loss of more than you wish to part with.