Hello! I have an idea :)
Name: Elena Kaller
Age: 10
Ethnicity/Nationality: Swedish
Gender: Female
Appearance: A darling girl with large, baby-blue eyes, Elena is slim and athletic. She has a small, pink mouth that can always be found spread in a genuine smile over the simplest of things. She is fair in complexion and burns pretty easily, so she is definitely more of an indoor-sports kind of girl. Her long, pale blonde hair is usually resting in a tight ballerina bun, but when it's left to its own devices, it can reach as far as the back of her knees. Her favorite clothing style is colorful and practical, but her parents only packed her "boring" neutral-colored clothes, so she is seen wearing those sorts of things during her stay at the school.
Personality: With an unquenchable curiosity for those things forbidden to her, Elena has a bit of a knack for getting herself into trouble, but her quick wit and charmingly childish personality can usually warm the hearts of anyone angered by her intrusion… "usually" being the operative word (and that word being a bit of a lie). She pretends to be wonderfully naïve in the ways of the adult world, but actually knows a fair bit, a fact that can make people uncomfortable at polite dinner parties. The only time one might see Elena unhappy is if someone – it doesn't matter who it is – is injured or in pain.
History: Elena was born in Sweden but raised in the U.S. Her parents sought the most prestigious education available for their little girl, and so rapidly enrolled her in one of the best schools available in the world. She has a younger brother, Victor, but he's a bit slow and is homeschooled for that reason. Afraid that Elena might forgo her study habits during vacation, Mr. and Mrs. Kaller elected to keep their daughter at school, where they charged her with calling them at the end of every day to tell them what school assignments Elena had completed. Elena is a bit of a liar and makes up all kinds of things to avoid getting in trouble with her parents.
Misc: Elena is a huge fan of gymnastics and has been given classes for eight years, and so will do some pretty crazy stunts just out of the blue. Her energy seems tireless, but when she's asleep, she's out for a solid eight hours – no exceptions.
EDIT: Whoa, sorry about that wall of text x_x Fixed!