RFB is a T-Doll character from Girls' Frontline, known for her sharp wit, sarcastic humor, and laid-back attitude. She is based on the Rheinmetall RM277 bullpup rifle and is portrayed as a highly capable but somewhat lazy frontline unit who prefers to avoid unnecessary effort. In the series, she serves as a combat doll with strong offensive performance, often standing out for her playful personality and distinctive dialogue. Her role adds comic relief while also highlighting the tactical variety of the game's T-Doll roster.