Blitzen

Blitz is a homeless man who is friends with Magnus Chase.

The Sword of Summer
Blitz warns Magnus that two people are looking for Magnus and are passing flyers around town for him. He tells them that a middle aged-man and teenager girl are looking for him, tells Magnus to be careful, and then quickly disappears before Magnus can say anything back.

Appearance
Blitz usually looks like he had just finished running through a dirty hurricane. He has black hair, a curled beard, and dilated eyes. His face is the color of saddened lather and looks like he is permanently alarmed. He is about five feet tall.