Thorfinn's appearance is consistent throughout the story. He has bushy hair, old clothes and two knives. He is also short, as stated by multiple characters in the story.

When Thorfinn was a child, he had a happier face, round with bright, curious eyes, and well-kept hair.

He has a somewhat slight build that belies his strength.

Thorfinn's entire body is littered with scars, most of which were caused by blades. His face remains unmarred until he gains several obvious scars on his face in adult