The Arpeggio is designed to resemble one large Nobody logo. The headstock of the sitar consists of three large, light blue spikes with blue bases. The neck of the sitar is blue with light blue, concave edges, and three yellow, pointed machine heads are visible on the left side of the weapon. Several yellow frets line the fretboard. The body of the Arpeggio is connected to the neck by a dull blue spike shaped like those on the Nobody logo, and the body itself is shaped like the lower half of the symbol. The shape of the symbol, particularly the circular indentions on the bottom of the sitar, is distinguished from the rest of the sitar by a light blue border. The sitar's saddle is yellow and its three strings are a very pale blue.
Musically, an arpeggio is the playing of notes from a single chord in rapid succession.
| Interdiction | Sharpshooter | Lindworm | Frozen Pride | Skysplitter | Book of Retribution | Lunatic | Eternal Flames | Arpeggio | Fair Game | Graceful Dahlia | Foudre | Kingdom Key|
Oathkeeper | Two Become One | Oathkeeper & Oblivion | Dream Sword | Way to the Dawn | Kingdom Key D | Dream Rod | Dream Shield
During battles, in Kingdom Hearts 358/2 Days, you can play as Demyx in mission mode. Demyx fights with quick strums and uses magic. He doesn't have a very good attack but high magic, Demyx will you Arpeggio to make fast strums and swing his sitars' around to hit the many heartless whom may be attacking. Arpeggio is very smooth to fight with and is the featured sitar that you see in Kingdom Hearts II.