An expressionist personalizes everything they own, are extremely creative and all around bad ass. Their hair is never natural but always all their own style, all of their accessories are home made and all of their clothes edited. Although they are strong minded and will never stand down in a fight they are generally more caring than "popular" kids, which are normally looked down upon by expressionists.
"Look at that girl with the duct tape belt having a yelling match with Shelly!"
"I know. What an expressionist!"