Born at Callahag Keep in 399 ATR during a summer year, Brian is the second son and child of Brianna Cedar and Eadward Callahagan, king of Callahagan. He was named after his late grandfather, King Brian IV. Brian has two elder siblings: Cormac and Ceira; and two younger siblings: Liana and Seán. As a child, Brian was educated and became close to Goodseer Owen and trained with weapons by the master-at-arms, Sir Siarl Glynn.
Brian enjoys reading, and spends much of his time exploring the library at Callahag Keep. His favorite books are about the histories of Aboria and its mythology. He is also enthralled by tales of knights and heroes, and dreams of becoming a warrior and travelling the world. However, he is clumbsy and cowardly. Brian practices at sword with his elder brother Cormac daily, although he never seems to improve. He is also very inquisitive, and enjoys asking questions and learning about the castle staff.