He was born the son of a carpenter in Denmark, in a small village quite distant from any large towns or cities so he grew up cut off from the media and most forms of advanced technology. He wasn't a sociable person from young, growing up much like an introvert - he sat at the side and read a book while the kids played, and even when he played he played only when no one was around and he delighted in that form of entertainment. The first time he ever had contact with his godly parent, the Goddess of Winter, Skadi was during a particularly cold winter night when he was nine. He was down with an extremely high fever of forty and a half degrees Celsius, even though they were at the height of winter and every time he went into spikes of agony the winter grew even colder, causing even more damage and suffering for the town.
He heard his father talking to someone he couldn't see outside the room, and then when the woman walked in he found his breath taken away because she was the personification of Winter. The woman touched his head and sang to him, in a voice that made him feel nostalgic about a mother's love - something which he had never felt before and overnight his fever had vanished and the winter storms calmed down, back to normal. His father never spoke of her to him, and Sieghart had written the entire night's experience off as a dream instead of reality. It was simply a miracle.
Fast forward some more years and Sieghart was now a grown boy, his first year into high school. He returned home to find that tragedy had struck - his house, a log cabin on the outskirts of the village had been destroyed and his father in the center of the rubble, long dead. No last words, no anything. The beast who had done this had not been far; an ogre of the Wild Hunt. Although Sieghart was powerless to stop this unnatural beast, he was driven by rage but in his headlong charge knocked into the air, and his body ... His body was fine. He was not shattered, but instead a block of ice had stopped the blow of the ogre.
The ogre was in wrong territory. The Wild Hunter's jurisdiction was not in this area and his mother granted him the powers - a gauntlet with a crystal of pure ice in the very center to let him fight, and for the fight his mother had guided him in his battle, where he emerged triumphant and in one act of cruelty the Gods so favored, he tore the still beating heart of the ogre out of his fallen enemy's chest, after shattering his spine in three places by lances of permafrost.
Skadi took the body of her dead mortal love and brought him back into her realm to be buried, to rest undisturbed for all of eternity. He mourned his father for a moment, before he took the pair of goggles that was once his father's, his last living memento of his mortal parent and he left through Skadi's passage through her realm where the laws of physics and boundaries of time and space warped and shifted, and he found himself at the Boarding School.
He fit in perfectly, over the years, becoming a model student for his juniors in the eyes of his teachers, though they did comment that he could be a bit more warm to others. Even at the age of eighteen he has performed feats that earned him the respect of adults, being able to keep his mind calm during treacherous situations, like field trips gone wrong where the congregation of demigods were set upon by monsters.
