The Quartet's headstock is bright blue and roughly oval-shaped with two large gaps in its center. The neck is teardrop-shaped and is bright blue with blue-white edges. Its body is roughly circular in shape, with a large, circular notch taken out of each of its sides. It has a thin, bright blue section in its center, a black teardrop shape on each of its upper corners, and thick, blue-white edges. Each of the two black sections on the Quartet's body sports a sky blue diamond in its center, and there is are two thin, silver diamonds at the base of the instrument. This Sitar seems to only have one, white string.
In musical terms, a quartet is a group of four that sings, dances, or plays music.
The Quartet's ground combo starts with a 360° spinning attack, after which, Demyx strums the Sitar, emitting a yellow shockwave which damages any enemies around him, followed by a leap and a series of very fast airborne spinning attacks, and ends with four quick blasts of yellow shockwaves in an outward direction.
The aerial combo consists of a series of very fast airborne spinning attacks, followed by a blast of three yellow shockwaves forwards.