Britney is a significant authority figure encountered early in the world of Grimgar. His real name is Shibutori, though he is almost exclusively referred to by his chosen alias, Britney, and he has a noted preference for being called Bri-chan.

As the Commanding Officer of the Red Moon Volunteer Army, which serves as the reserve force for the Alterna Frontier Army, Britney holds an official government position. He is the individual responsible for introducing the protagonist Haruhiro and his companions to the harsh realities of Grimgar. Upon their arrival in the world with no memories, it is Britney who presents them with their primary option for survival: to become trainee volunteer soldiers. He offers the group a simple, stark choice: accept a small amount of money and enlist as volunteer soldiers, or refuse and attempt to survive on even less income from other odd jobs.

Britney has been a volunteer soldier himself for at least fifteen years, placing him in an older generation of fighters than many other characters, such as Unjo. This extensive experience implies a significant level of personal strength and competence. His combat class is that of a Paladin, suggesting proficiency in sword-and-shield combat maneuvers as well as the use of light magic. His long tenure and his role as a commanding officer indicate that he is not only skilled in combat but also adept at administrative and accounting duties.

While his role in the story is not as a main combatant, his function is crucial as a catalyst for the plot. He represents the indifferent and systemic nature of the world of Grimgar, providing the protagonists with the means to begin their journey but offering little in the way of additional guidance or emotional support. His personality is not explored in great depth, but his preference for the nickname Bri-chan hints at a possible idiosyncratic or perhaps unexpectedly casual side beneath his official veneer.