Robin Willoughby was born to John Willoughby and Iona McKay. John, a muggle Londoner who was studying a Ph. D in Medieval History at King's College London was on academic leave - writing a dissertation on Scottish Castles. His chosen subject was the ruins of St. Andrews castle. Little did he know that it was absolutely infested with ghouls and poltergeists - each of whom were possibly very dangerous. This was how he met Iona; a ghoul exterminator. She was a local Scottish lady who was feisty and ferocious; an unlikely perfect match for the quiet and subdued John. But the two hit it off - it turns out that saving one's life from malevolent spirits is quite the icebreaker when it comes to romance.
The two courted for a while, until John completed his doctorate and moved up to Scotland. He got a job as a Professor of Medieval Studies at St Andrews University, and for a while, he and Iona were content. It wasn't all smooth sailing though - Iona was from a strong line of Druidic Wizards and Witches - and to not marry her kind was a massive taboo. It was made worse by the fact that she was an only child; and in the eyes of her parents, she was a traitor to the family by tainting the bloodline. Similarly, John's parents did not approve of the fact that he had just upped and left the family for some random Scottish woman who they did not particularly trust. But they had each other - and soon, they had Robin.
Robin was a peaceful baby. He wasn't much of a crier, nor was he particularly fussy. He was quite content. But this came at an expense. You see, Robin was born in Breech position, meaning he was facing the wrong way whilst Iona was in labour. Complications in the delivery resulted in the loss of Iona, in place of Robin's safe birth. John was devastated. Determined to push on and give this child the best possible life, John and Robin moved to the Shetland Islands, where they enjoyed a quiet, snowy life away from the hubbub of daily life. Robin's first sign of magic happened here - when he was about ten. He had been playing with some small pebbles by the pond in their tiny garden. He had squeezed a pebble, only for the pebble to almost transfigure into clay in his hands - it was mesmerising. This was the point when John told him about his mother, and that he was a wizard. He was sheltered, but Robin was happy. And, to be fair, so was John.
It was the summer after this incident when tragedy truly struck for Robin. It was summertime, and the Willoughbys had been living quite off-the-grid for a while now. But their peace was about to be destroyed. Once the druids from Iona's clans had found out she had died in childbirth, they assumed it was a bad omen for the child to continue living - a threat to their clan. Therefore, they had made it their mission to hunt him down and ensure he didn't live, for their own longevity. So they found the wooden cabin that John and Robin had been living in - and set it ablaze. Luckily, Robin's bed was by the window - he was able to escape easily. John did not share the same luck. The fire had consumed his room, and had made the metal doorknob impossible to touch without getting burnt. He perished in the flames, whilst Robin watched from outside, in despair until the emergency services arrived. At the tender age of ten, Robin was made an orphan.
He was sent to live with his father's parents in London, but it wasn't a comfortable few months. They quite resented him, and blamed him for the death of their son. He was seen as an unlucky child, an omen and harbringer of death. The druids referred to him as 'The Grimm', due to the fact that everyone he was close to had tragically died. The summer was bleak - but Robin soon found his way back home to Scotland, when he got on the train to Hogwarts. He is currently about to enter his fourth year.