If you are willing to learn that's all that matters.

Physicality
Age: 11 Years
Height: Halden is slightly taller than 5.3 feet (ca. 162 cm).
Weight: He weighs about 75 pounds (ca. 34 kg).
Hair colour: Halden has dark blonde hair which he tries to keep out of his face. Of course, he doesn't always have such stylish hair; it can get very messy, especially in the mornings or after a long day of studying or sports.
Eye colour:The colour of his eyes is grey with flecks of gold around the iris. When looking at them from far away the colour looks more like a pale green.
Build: He is tall for his age, much like his mother, Mare, was when she was young. He has a slender build but is a bit more on the muscular side since he likes to play sports like tennis and quidditch.
Skin: He has pale skin mostly without freckles and marks. He has a few minor scars from getting hurt when younger but no scar large enough to gather attention from others. The most notable scar, if you could even call it that, would be the scar on the left side of his lips. It is completely invisible to the eye unless you stretch the skin of the lips, only then can you see a faint white line moving across the upper lip down to the lower lip like a small string of cobweb. He can't recall what caused this scar, however, and just accepts it as a weird quirk of his.

Personality
Halden has a great thirst for knowledge and power, he is ambitious and hopes to one day join the ministry of magic. He is also quite interested in muggles, and he loves to ask his grandfather about them, though he is even more interested in learning new spells. He can be quite cheerful, and he likes to smile, but he is also quite aloof. You will probably find him staring into the distance with an empty gaze more than once, daydreaming of what the future holds. He is a quick learner, and he also likes to give witty or clever remarks. He likes to sketch and has a large leather-bound book full of pages.

History
Halden was born in London, England in 2008. His parents, Aleksander Frostulf and Mare Frostulf, were both capable of magic. Mare had gone to Hogwarts, unlike Aleksander who had gone to Durmstrang since he lived in Scandinavia at that time. Even though his parents aren't muggles Halden is still recognized as a half-blood because of his muggle grandfather on his mother's side, it's not something he is ashamed of (his grandpa is an amazing person and he had a successful career as a tennis player when younger).
Halden, as a young boy, was very familiar with the wizarding world and his parents were very pleased when his magical abilities first surfaced. He had a fairly usual childhood for someone born into the wizarding world, going to quidditch matches, getting homeschooled by his parents and such. He did play around with the 'Internet', as the muggles called it, he found it very entertaining but he could only do it on his grandfather's box and screen that he had at his home. Halden has been looking forward to joining a wizarding school for a long time now.