Biography for
Rubeus Hagrid (Character)
from Harry Potter and the Sorcerer's Stone (2001)

Hagrid enters the story almost immediately as a mentor-figure to Harry and his friends. In the first book, Rubeus Hagrid is the one who retrieves Harry from his Aunt and Uncle, informs Harry that he is a wizard, gifts Harry with the boy's beloved snowy owl, Hedwig.

Hagrid is Half-Giant (father is human, mother is giant) and gentle as a lamb, unless you insult headmaster Dumbledore in front of him. He always had a love for and a gift for caring for magical creatures, becoming a teacher of the subject in the third book (POA). This love extended to a giant spider (acromantula) named Aragog and countless others. During Hagrid's third year in Hogwarts, Aragog was accused of opening the Chamber of Secrets, resulting in Hagrid's expulsion from the school and his wand being broken. The two halves of his wand are now in a pink umbrella which we saw light a fire and give Dudley a pig tail in 2001's "Harry Potter and the Sorcerer's (Philosopher's) Stone." During Harry's second year (COS) when the chamber of secrets was open, Hagrid was sent to Azkaban because they thought it was him who opened it, just like they thought he opened it during his third year. When Harry defeated Tom Riddle and the Basilisk, he was released because they knew it wasn't Hagrid who opened it. Ron sent the release papers to Azkaban with Errol. This cause them to be delayed because of Errol's old age.

During Harry's third year (POA), Hagrid gets a few hippogriffs to show to his Care of Magical Creatures class. One of them which he grew close to was named Buckbeak and attacked Draco Malfoy in it's defense. This caused Lucius Malfoy to order Buckbeak to be sentenced to death. Buckbeak was eventually saved, however, in order to help save Sirius Black. Harry and Hermione saved Buckbeak by going back in time. Hagrid and Cornelius Fudge thought he escaped on his own, but Dumbledore knew they saved him because it was him who gave Harry and Hermione the idea to go back in time. Sirius Black flew away from Hogwarts into hiding on the back of Buckbeak. Buckbeak eventually became Sirius's because he needed him to stay on the move. In Harry's fifth year (OOTP), we find out that Hagrid has a half-brother who is a giant named Grawp. Hagrid and Grawp grow very close. In Harry's sixth year, Aragog dies and the only people who show up to his funeral are Harry and Professor Slughorn.

Way better then any other character in the book. Period.