From the 3 creatures here I only redconize Grendel since he is from the Epic Beowulf. Grendel is a horrible monster that doesn't enjoy for others to have fun. The fact is that he torments the Danes each night for almost 12 years. He enjoys making other people sad, miserable, and he loves to torment them. One day though he is defeated by Beowulf a strong soldier from another kingdom. Therefore ending his torment on the Danes.
Chimaera's are a greek creature that breath's fire. Their body consists of Lion while they have two heads one goat and one lion, as well as a snake for a tail. They were first mentioned in 760-710 BC.