My grandmother called but no one was home
B: Set the mood for the scene that follows.
The author is obviously trying to set something up to happen here, most likely the entrance of another character and/or some dialogue. It would't make sense for there to bee any foreshadowing with such a warm atmosphere, and the author is describing the setting, not the characters.
Grendel is shown as a monster as he was exultant; highly elated about the presence of the kinsmen he wanted to devour.
Devout can mean pious or steadfast in your beliefs
