Weres are individuals who can, at will, transform into another animal. i.e. they are shape-shifters. However, they can only transform into one other creature, eg. werepanthers can only transform from human to panther, wererats can only turn into rats etc. and the transformation is complete: they remain either entirely human or entirely animal -no werefolk may acheive a 'halfway' balance. The way every were transforms is different - some change quickly, others slowly - it depends on the individual.
Werefolk are thought to be a form of wyrd as it is a condition which affects only humans. It is also hereditary. They are also known as Animagi since they can communicate with normal members of their werespecies.
As a rule they have complete contol over when they transform though under stress and duress, especially in a 'fight or flight situation' it is common for their instinctive animal nature to come to the fore.
Diet: omnivourous, though depends on their were-half
Alignment (if any): neutral. Depends on individual