Torulf is... He reminds me of... Ehh... In my opinion, he's the only one that truly warps Arvo in a structural sense. The only one that...
Everyone in the story of course brings out sides of him, highlights needs, or opens him up to new possibilities about himself and about the world, but Torulf makes him into something he's not. Twists him up inside.
It reminds me too much of people I've met/interacted with before.
Overall though, just as everyone else in the story, he's a well written and believable character. He just hits a little to close to home in some ways.