Read the excerpt from grendel.
there was nothing to stop the advance of man. huge boars fled at the click of a harness. wolves would cower in the glens like foxes when they caught that deadly scent. i was filled with a wordless, obscurely murderous unrest.
how is grendel characterized in this passage?

Assuming this is a description of reactions to Grendel, I think Grendel is full of confidence and passion, perhaps some anger as well ('murderous unrest'), carries an air of authority, having supremacy over the situation ('wolves would cower... like foxes).

Grendel is also characterized as a negative character, supposedly emitting a 'deadly scent' with a 'wordless, obscurely murderous' description which hints at a character of no mercy or emotion

hope that helps :)