About me: Sandor Clegane, popularly known as the Hound, was the younger brother of Ser Gregor Clegane and the personal bodyguard of Prince Joffrey Baratheon. When Joffrey ascended the Iron Throne, Sandor was named into his Kingsguard (despite not being a knight), but deserted his post at the Battle of the Blackwater. After traveling as a fugitive with Arya Stark, having a close brush with death following an altercation with Brienne of Tarth, and the mass murder of a congregation he attempted to find peace with, he reluctantly joined the Brotherhood Without Banners in hopes of having a greater purpose.
Upon the return of the White Walkers and the army of the dead, Sandor fought alongside the armies of Jon Snow and Daenerys Targaryen in order to prevent a second Long Night. Following their victory, Sandor returned to a decimated King's Landing, where he died throwing himself from the Red Keep, alongside Gregor, ending their bitter lifelong rivalry and fulfilling his campaign of revenge.
Sandor Clegane is a skilled warrior in the service of House Lannister, known primarily for the horrible facial scarring he bears on the right side of his face and for his fierce demeanor and lack of chivalry. Sandor is the younger brother of Ser Gregor Clegane, nicknamed "the Mountain", a monstrously huge knight and arguably the most feared man in Westeros. In his youth, Gregor nearly burned off half of Sandor's face because he found Sandor playing with a toy that Gregor had discarded. Sandor didn't even "steal" it, he was merely playing with it and assumed he didn't need Gregor's permission. Without warning or uttering a word, however, Gregor grabbed Sandor and "punished" him by holding his head into a burning brazier. Gregor was only forced to stop after half a dozen servants managed to pry him away from his brother. The incident left severe burn scars over the right half of Sandor's face, thus he usually wears his hair long on that side to cover them. Instead of blaming Gregor, their father merely stated Sandor's bed caught fire. Ever since, Sandor has been deeply afraid of fire.
Although not as large as his older brother, Sandor is very large and a formidable fighter in his own right, considered one of the most skilled and dangerous men in Westeros. Sandor gutted his first man in combat when he was twelve years old (given the date, this was probably as a young soldier during Robert's Rebellion). Sandor finds killing to be the best thing in the world, and although he isn't a crazed killer who will murder anyone regardless of the law like his brother, he cynically pursues occupations as a bodyguard and soldier which allow him to kill legally--though he scoffs at the hypocrisy of people who think there's really much of a difference. After seeing his brother knighted by Prince Rhaegar Targaryen despite being an infamously dishonorable man, Sandor became jaded with knighthood and developed an extreme contempt for romances and songs which present knights and wars as chivalrous and glorious, knowing all too well that supposedly honorable knights frequently butcher the innocent while claiming glory. Thus, Sandor has steadfastly refused to be knighted or take holy vows. Sandor wears a dark set of heavy armor when in battle, and is known to wear a custom helmet shaped like a snarling hound's head, after his family's sigil. He rides a personal warhorse called Stranger, whose namesake is the seventh and final god in the Faith of the Seven who represents death and the unknown.