The character described in these lines is Beowulf.
Answer: A
Explanation
Beowulf from the story 'Beowulf' is a courageous warrior who defeats Grendel the monster for the King Hrothgar.
The line shows the invincible strength Beowulf portrays when he is about to fight Grendel.
Grendel who was attracted to the feast conducted by the King Hrothgar started his warfare over the kingdom of Danes.
After many years, this news comes to the ears of Beowulf who had gratitude to the King Hrothgar.
Beowulf decided to pay his gratitude by destroying Grendel.