Pax au Telemanus
Over seven feet of joyful violence, who announces himself to every enemy he meets and shows a loyalty to Mustang that embarrasses everybody present.
Pax is the youngest son of Kavax's enormous, cheerful, terrifying family, and one of the first Golds to show Darrow that nobility can occasionally mean something.
He dies at the close of the The Institute, shielding Darrow. Darrow and Mustang take his name with them; years later, she names their son for him.