Answer and Explanation:
Grendel is considered a force of evil as he came up hoping to kill, up from his swampland, and intended to tear life from soldier's bodies. The writer has clearly shown through his words that Grendel was an evil soul like: "had bewitched all weapons/spells that blunted every mortal man's blade (wouldn't hurt him); his death is near, will go to hell."
In Grendel, he is a lonely creature who seeks the meaning of the world. He was trying to get an understanding of the seemingly meaningless world around him. Being an outsider, Grendel observes and provides perspective on the human civilization he battles.
Foreshadowing is also a distinct element in this poem. The unresponsive thrust foreshadows the unresponsive humans, for example, the allusion to the curse of Cain foreshadows the appealing of the dragon and the Christian imagery that encompass Beowulf, the dark presence that Grendel sensed in the woods, and the snake he misunderstood for a vine foreshadow his meeting with the dragon and the arrival of winter foreshadows Grendel's death.
