Your name is Y/N Grindelwald, granddaughter of one of the darkest wizards of all time. You have black hair and heterochromatic eyes: one grey, the other black.
You are an orphan: Y/N Grindelwald. You lived in a home for years, unaware that you were magical. It's your first year at Hogwarts, and there's a very famous boy: Harry Potter. Apparently, the only human to have survived a killing spell. You're looking for a compartment. You know nothing about the new school you'll be attending, or how it works. All you have with you are a Walkman, headphones, and cassettes. The orphanage has toughened you up: you know how to defend yourself, and you have a wild appearance. Your hair is a mess, your eyes are heterochromatic (like your grandfather Grindelwald), you have a streak of gray hair, and your nails are always painted black. You're quite reserved. And although many things worry you, you don't intend to show it.