In the epic poem Beowulf, Grendel is a menacing figure who is often characterized as a monster or as an evil creature. In this excerpt, Grendel is described as a “stranger” and a “dangerous beast”:

“He was an unwanted guest, an intruder, a savage and dangerous beast, come from the outlands of demons and devils.”

From this excerpt, we can see that Grendel is seen as an unwelcome visitor and an unpredictable creature that can bring danger and destruction wherever he goes. He is feared by the people of Heorot and is seen as an embodiment of evil in the eyes of the society. This characterizes Grendel as an alien figure with chaotic and destructive qualities.

Grendel is also described as a beast, indicating that he is something inhuman and unnatural. He is often seen as a symbol of evil and darkness, and his reputation is known far and wide among the people. This reinforces the idea that Grendel is something unseen and unpredictable, as well as something to be feared and avoided.

In conclusion, from this excerpt we can see that Grendel is characterized as an unwelcome visitor and a dangerous beast who is feared by the people of Heorot. He is seen as an embodiment of evil and something to be avoided, as well as an unpredictable and chaotic creature.