Brian Meno Moderato serves as a tactical sorcerist for the Magic Administration Bureau, alternatively known as the Sorcery Management Bureau, within the urban metropolis of Tristan. He works within this organization dedicated to regulating magic use, combating demonic threats, and ensuring public safety. Brian holds a field operations position, working directly alongside fellow sorcerists like Leiot Steinberg and Isaac Hammond.

His duties involve utilizing specialized equipment, including mold armor designed to resist magic's corrupting effects and prevent demonic transformation. This armor, referred to as a straitjacket, is standard tactical gear for Bureau operatives. Brian wields magically enhanced weaponry: large railguns firing tainted bullets powered by a combination of steam and magic, effective against demonic entities.

Background details regarding Brian's personal history, character development, motivations, relationships, or specific actions within official media remain undocumented.