Jon Stark

Jon Stark, Second of his Name, King of the North, The Eyrie, The Riverlands and the Iron Islands, Protector of the People, King of the First Men is the only son of Lyanna Stark and Rhaegar Targaryen. Born Aeron Targaryen, he grew up with his mother calling him Jon, as to keep the identity of his father hidden. He joined the Night's Watch with his uncle Benjen at the behest of his mother when he was sixteen. When Robb became King, he made an official notice that "Jon Stark" be named his heir as he was the only "brother" known to him to be alive.

After he learned of the death of his Uncle at the hands of Joffrey Baratheon, he tried to leave the Night's watch to join his cousin but was thwarted by the brothers. Not long after this, he learned of the Red Wedding. He was voted the 999th Lord Commander of the Night's Watch and changed the rules a bit. He fought wars with the dead and managed to kill the Night King at Hardhome, but due to his allowing the wildlings to cross the wall, there was a coup and four of his men killed him.

He was ressurected by Mellisandre, avenged his murder and left the Watch. Before he could leave, his cousin Sansa Stark rode through the gates looking half dead and frozen. He brought her inside, warmed her up as she told him of what she'd been through and how she'd escaped. The two rode south, gathering houses in order to take Winterfell back from the Boltons, (it's during this time that they grew to love each other romantically), after which he was named the first King in the North in five years, the second of his name.

Many believe that when Jon came back from the dead, he came back as Ned Stark reincarnated, due to the many similarities between them, and how much he resembles his uncle.