Uter is the Swedish/German (seems to attribute more Swedish heritage, but could possibly be German) exchange student on the Simpsons. He has never had any true key moments and usually makes brief appearances in various stints throughout each season. In a recent episode, "Guess Who's Coming To Criticize Dinner", each student mentions that they haven't seen Uter since the last field trip (which was to a Civil War recreation site), and his parents are later seen with Principal Skinner at the Frying Dutchman restaurant (this doesn't make sense, since Uter is an exchange student, and it's not likely his parents would come all the way to the US just now).
Overall, Uter is just another chunky blonde boy that cuts scenes for comic relief.