Need to know how grendal and grendals mom are similar and different.using at least 3 major elements

The poet explains that Grendel and his mother are the descendants of the Biblical Cain, which suggests not only that they are part of a larger religious or supernatural scheme of evil, but also that they are connected with one of the worst things possible in tribal culture – fratricide, or the killing of a brother. However, at other points in the poem, Grendel seems less like a Biblical figure and more like a ghost, a demon, or something else that belongs in a Halloween-themed horror movie. The narrator of Beowulf claims that Grendel's motivation is hearing Hrothgar's bard sing songs about God's creation of the world, which rubs his demonic nature the wrong way.Grendel's mother on the other hand seems more bent on vengeance for her son rather than simply being avoid by all the Viking party music going on all night.