In what ways did the battles between Grendel and his mother differ from the confrontation with the dragon? Does this show any changes in Beowulf’s character?

Why does Hrothgar accept Beowulf and his men? After all, they arrive armed and unknown, and could be seen as a serious threat.

Consider two heroes of this week, Beowulf and Christ in Dream of the Rood. Do they share heroic qualities, or are there significant differences between them?