Answer:
Grendel is characterized as critical of himself but unable to contain his curiosity.
Step-by-step explanation:
Grendel shows how critical of himself he is when he says that people would say that as good as his father used to be, he demonstrates that he sees himself like he is not able to fulfill the role he was given, and at the same time he can not help but to see just out of curiosity if other people in a different place see him in the same way.