Beowulf is an anglo saxon story about an epic hero it's a story with a kingdom being terrorized by a scary monster and the story about the monster spreads to other kingdoms and then this hero heard about it and lend his hand to help them out and bring back the peace to that kingdom. Beowulf in this story is good and grendel the monster is evil and his mom is too they terrorize the hall in which they host their celebrations and at night the monster would come and slay and murder each and every person that was in that hall that night. Grendel is pure evil because he has no conscience , no quench for his thirst of blood and killing he simply does not care about the actions he commits. For that he is the epitome of all evil he does not care for