The term "Principal Viola" refers to the lead player of the viola section in an orchestra or ensemble. This musician is responsible for playing the primary viola parts and often takes on a leadership role, guiding the other violists in performance and rehearsals. The Principal Viola may also collaborate closely with the conductor and other section leaders to ensure cohesive sound and interpretation. In addition to performing, the Principal Viola may be involved in selecting repertoire and making artistic decisions for the viola section. The role is crucial for maintaining the overall balance and harmony within the string family, which includes instruments like the violin, cello, and double bass.