Who is Grendel from The Anglo-Saxon World: An Anthology and what is their importance? The_Anglo-Saxon_World English & Literature Grendel | The Anglo-Saxon World: An Anthology

Grendel's mother is a hideous monster like Grendel, and when she sees what Beowulf has done to her son, she shows up to get revenge. Beowulf has to follow her to her underwater home, which is guarded by sea-monsters.