Final answer:
Grendel is characterized as a monstrous and malevolent creature in the epic poem 'Beowulf,' similar to the ferocious entities described in the texts provided.
Step-by-step explanation:
One characteristic of Grendel mentioned in the Beowulf poem is his monstrous and malevolent nature. Grendel is depicted as a fearsome creature despised by the heroes in the epic due to his tendency to wreak havoc and challenge the peace of the kingdom. While the provided text does not directly refer to Grendel, it does describe similar antagonistic entities such as dragons and hermits with malice, highlighting traits like monstrous demeanor, ferocity, and opposition to the heroes, which are suggestive of Grendel's own characteristics as described in the poem. These elements serve to underline the stark contrast between the heroic characters and the monstrous beings they confront, a central theme of the narrative.