Monster heroes are typically, big, strong and scary, having some very obvious physical feature that sets them apart from ‘normal’ humans: scaly skin, fur, teeth or horns.
A specific power in this set allows the Monster hero to pass for human, but otherwise, he or she is always a monster and it is obvious. Frequently, they have self-control issues and can fly into a rage or a bloodlust.
Update with changes to the size powers to make giant monster characters more playable! (Thanks, Sam U!)
Download the complete Power-Set here: Power-Monster