James Alexander Potter (b. March 27, 1960) was a Pure-blood wizard and only son of Alexander and Grace Potter. He attended Hogwarts School of Witchcraft and Wizardry from 1970 to 1977, where he was sorted into Gryffindor house. He, like his future wife, is a canon character in the Harry Potter books. He comes from very wealthy family, and he also happens to be an Animagi, having the ability to transform into a white stag (earning him the nickname "Prongs").
James, from Chapter 2, was described as tall, black-haired, strong-jawed, straight-nosed and having glasses. He was extremely handsome, as proved by the many girls who fancied him. He had a very casual sort-of air about him, and had a nice, crooked grin. Many of his mannerisms were shared by his father.
His best friends were Sirius Black, Remus Lupin and Peter Pettigrew, whom he considered like brothers. They were close from the start, and caused much mischief together. James, by far, is closest to Sirius; yet, the Snape incident pushed them to be "at a point where they can't come back", but they have since reconciled. He has many enemies, most (all) of which are Slytherins. James's main relationship in the story is Lily Evans , who he had a crush on since First Year. Lily began to fancy him back at the begining of Seventh Year yet, sadly, he was in a relationship with Carlotta Meloni at the time. James did fancy Carlotta, though never as much as Lily, and he liked how straight forward things went with her, but he could never quite get Lily out of his mind. James didn't seem to take the break up with Carlotta too hard, and it seemed maybe it was mostly his pride that was broken.
James, as said by the summary, was dynamic and implusive. He had a tendency to pick fights and be very confrontational when angry, which led him to do many, many stupid things. On the other side, he was extremely intelligent and very funny. He was loyal to his friends and wasn't afraid to take a stand; he didn't let anyone stop him from doing what he wanted.
After "The Life and Times"Edit
James presumably married Lily Evans soon after they graduated Hogwarts. They joined the Order of the Phoenix together, and according to the prophecy Trelawney made (the one Snape overheard), they had both been face-to-face with Voldemort three times before their death. James and Lily had their son Harry James the 31 of July, 1980. After Trelawney's prophecy James and Lily went into hiding with their son, using Sirius Black as their Secret Keeper. But Sirius made Peter Pettigrew the secret keeper at the last minute, believing they would have a higher chance of survival. However, Peter betrayed them, and handed them over to Voldemort. On Halloween 1981, Voldemort came to Godric's Hallow and murdered first James, then Lily, who left behind them the now orphaned one-year-old, Harry James Potter: the boy who lived.
Canon Divergence Edit
From the Harry Potter novels there is little known about James Potter. The physical description, and character description from The Life and Times do match what information JK Rowling provided us with.
However, The name James Alexander Potter was written as fanon by Jules, giving him a middle name after his father Alexander Potter. Alexander Potter doesn't exist, JK Rowling revealed in a pottermore post titled, "The Potter Family" the name of James' parents are Fleamont and Euphemia. James' middle name, according to canon is Fleamont.