Bjornir is a massive, barrel-chested man who looks as though he were carved from granite. He possesses thick, coal-dark hair that is often tied back and a dense, well-kept beard that covers much of his rugged face. His hands are wide and calloused, evidence of years of heavy labor, and his gaze is steady and unblinking. He wears soot-stained common clothes beneath a heavy set of chain mail, moving with a surprising, quiet grace for a man of his size.

Bjornir is a man of few words who prefers the honesty of hard labor to the complexities of polite conversation. He is stoic, rarely showing strong emotion unless his protectiveness is triggered. Having spent his life moving heavy objects and surviving on the margins, he views the world through a lens of utility. He doesn't value wealth so much as he values stability and a full stomach, though he remains deeply empathetic to those living in the streets.

Bjornir's life began in the crowded tenements of a coastal trade city. His father was a simple drayman who taught him the value of a hard day's work, but a winter sickness claimed both his parents when he was barely a teenager. Forced into the gutters, Bjornir used his massive frame to survive, working as a dockside loader and occasional strongman for a traveling carnival. His raw strength became his primary currency, earning him the nickname 'The Ox' among the local urchins. He spent years lifting what others could not, always one step away from starving in the very alleys he protected. Eventually, the carnival life grew stale and the docks became too small for his ambitions. A local noble attempted to cheat Bjornir out of a week's wages for hauling stone, leading to a confrontation where Bjornir simply lifted the man's carriage off the ground to prove his point. While he didn't hurt anyone, the threat of legal retribution forced him to flee the city. He took up the axe and donned chain mail, realizing that the same strength used to build walls and move crates could be used to protect himself and others in the dangerous wildlands. Now, he travels as a mercenary, applying his 'farmer strength' to the art of war.