Marissa here with character number six, the Mighty Thor!
Thor is coming in this year as a Junior, and he's at Stark School because he tried to slay some frost giants and was banished to Earth for his own good. (Odin hopes that the school can keep him in line). Currently, he doesn't have access to Mjolnir and is almost human as a result of his punishment (albeit a really tough, really ripped human).
Thor's kind of at the point in his life where he hasn't grown up yet. He's brave but also kind of a jerk about it. You can read all about him here or you can jump right into scene with him because he just got hit by the shuttle bus here.