Hagen of the Black Rock was a Thelomen Toblakai from beyond the southern mountain ranges of the Lands of Fist (presumably Stratem, though he refused to call his homeland anything but "Toblakai lands").
Like all Toblakai, Hagen was a giant of a man with a great mane of hair and a beard.
Hagen was an ex-Champion of the Stormwall, having risen to that rank after Traveller only to be replaced by Iron Bars. Despite being a prisoner, he generally had an amiable manner and was friendly with fellow prisoner Corlo. He tried to shout advice to Iron Bars on the Wall as the man crumpled with despair during battle.
- Hagen: "You are a most dangerous fellow, are you?"
- Corlo: "I'm a mage."
- Hagen: "A mage? Always I hear how the Korelri are so frightened of magi. You do not look so fearsome to me."
- Stormguard (cracking a stave against Haven's back): "No talking!"
- Hagen: "Is that rain?"
- Corlo: "Perhaps it was just the wind."
- Hagen: "Yes. The wind as from a baby's rear."
- ―Hagen and Corlo meet as prisoners on the Stormwall[src]