Brian is a dutiful man, he wished to become a knight one day, as he believed they are courageous and noble, protectors of the weak and fighters with injustice. Thus, he felt disgust when Fierce Scar offered a knight title for grain burning.
He was proud to become a patrol captain, believing other patrolmen admitted his merits, only to discover later that others simply avoided captain's duty to ignite beacon during the Months of Demons.
Brian was born in a hunter family. Due to own abilities he became patrol captain. He stayed every winter at beacon tower to warn towners about coming demonic beasts and ecape.
When he was a child he discovered abandoned well connected to the castle garden. For this he was beaten and prohibited to enter ever again.
Brian and Greyhound were called to Roland and answered his questions. He was excited seeing this as opportunity to be noticed and promoted by authorities. He was sure he would be chosen to protect new wall from demonic beasts. To his surprise, he didn't pass chief knight's check and wondered how prince intended to fight beasts with commoners.
He witnessed Greyhound's death by hands of patrol plotters led by Fierce Scar. He conspired all patrol team, promising knight title and other rewards for burning food reserves. Under the threat of death Brian led plotters to the tunnel connecting with castle's garden. When they reached basement he escaped from the group and fought them with Nightingale's help. When he woke up, healed by Nana, he was praised by Roland and promised to become a knight.
After long hours of training Brian became a confident swordman, capable to overcome several clumsy patrolmen.