Rubeus Hagrid

"You're a wizard, Harry."

- One of Hagrid's iconic lines, telling Harry he is a wizard

Rubeus Hagrid is one of the major characters of Harry Potter by JK Rowling. During his sixth year at Hogwarts, Hagrid was expelled from school. However, as an adult, he stayed on as the gameskeeper. Throughout the book series, he supports Harry and becomes one of his many father figures and was one of his first friends and the one to tell Harry of his wizardry heritage.

Hagrid is portrayed by Scottish actor Robbie Coltrane in the film adaptations of the Harry Potter book series with his teenage self portrayed by Martin Bayfield in The Chamber of Secrets.

Quotes
"No one ever lived after he'd decided ter kill ‘em, no one except you, an' he'd killed some o' the best witches an' wizards of the age — an' you was only a baby, an' you lived.""

- Hagrid to Harry, explaining the origins of his 'Boy Who LIved' Epithet "Never insult Albus Dumbledore in front of me!"

- Hagrid to Uncle Vernon after he insults Dumbledore "I would trust Hagrid with my life."

- Albus Dumbledore on his trust in Rubeus Hagrid

Background
During his fifth year, Hagrid's friend, Aragog was accused of being the monster responsible for innocent students being paralyzed by the Basilisk. Due to this, Hagrid was expelled. However, due to Dumbledore's influence, he was able to stay at Hogwarts and become gamekeeper at the school.

Harry Potter and the Prisoner of Azkaban
In the third novel, Hagrid is promoted to Care of Magical Creatures professor at Hogwarts after Silvanus Kettleburn resigns in order to, according to Dumbledore, spend time with his remaining limbs.However, things go awry in the first day of class, as Draco Malfoy insults Buckbeak, the hippogriff Hagrid used during the lesson. Following the event, Lucius Malfoy has the ministry order Buckbeak's execution. However, Harry and Hermione use a time turner to save Buckbeak and Sirius Black.

Trivia

 * Hagrid is one of the characters to appear in all 8 films.