Who is Grendal in the book Beowulf?

In the epic poem "Beowulf", Grendel is a monstrous creature who terrorizes the kingdom of the Danes. He is described as a powerful and destructive being, who feasts on human flesh and dwells in a dark and dangerous mere (a lake or marshy area) not far from the Danish settlements. Grendel emerges from his lair every night to raid the mead hall of Heorot (the center of Danish festivities and gatherings), killing and devouring the warriors who seek refuge there.

Grendel's reign of terror has brought fear and misery to the Danes, who are unable to defeat the creature by conventional means. His name has become synonymous with destruction, evil, and the untamed forces of nature that threaten human civilization. He poses a significant challenge to Beowulf, the protagonist of the poem, who arrives in Denmark from Geatland with the intention of confronting and slaying Grendel and putting an end to his gruesome attacks.