Brokkr is a stout, muscular dwarf with skin the color of polished mahogany and a beard that smells permanently of ozone and coal smoke. His beard is intricately braided with small copper gears and silver wire. He wears a heavy leather apron covered in pockets over his scale mail, and a pair of brass-rimmed goggles usually rests on his forehead. His most striking feature is the heavy, runic hammer he carries, which glows with a faint blue light whenever he speaks.

He is intensely curious and perpetually optimistic about the potential of machinery. Brokkr talks to his inventions as if they were children, often apologizing to his Steel Defender when it takes a hit in combat. He grows restless if he stays in one place for too long without a project to tinker with.

Brokkr was once a respected member of the Ironfist Masonry Guild, known for his ability to weave minor enchantments into the foundations of mountain fortresses. However, he became obsessed with the idea of sentient stone and metal, leading him to experiment with forbidden kinetic arcana. After an incident involving a self-propelled brewery wagon that demolished the guild master's front porch, he was politely but firmly asked to take his 'eccentricities' elsewhere. Rather than being bitter, Brokkr saw this as an opportunity to see the world. He spent the last decade traveling, using his skills to repair village infrastructure and create defensive automatons for those who cannot defend themselves. He believes that a well-placed gear can solve more problems than a thousand sheets of guild bureaucracy ever could. His current traveling companion is a four-legged mechanical construct he calls 'Hugin,' which serves as both his protector and his best friend.