Which line best the reader understand grendel’s character?

In time I began to be more amused than revolted by what they threatened. It didn’t matter to me what they did to each other.

Explanation:

Grendel is a character from the epic poem Beowulf (AD 700–1000). Often depicted as a giant or a monster, Grendel tortures people in the mead-hall, Heorot, until king Hrothgar invites Beowulf to stop him.

This particular line best helps us understand Grendel's character, because we are given an insight into his thoughts. Grendel was irritated by the noise that came from Heorot during the feast. This is why he began attacking Hrothgar's people. Over the course of time, his anger towards them weakened, and killing people became fun. The very fact that Grendel is entertained by murdering people demonstrates his evil nature.