THE SOUND FOUR

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  The recurring symbol on the Sound Four's tunics was the yin-yang, though the yin colour (black) was missing. The missing yin represented imbalance, alluding to their evil natures and to that of the seals, preventing harmony in life.
• Jirōbō and Sakon (and Ukon) specialised in close-quarter combat, while Kidōmaru and Tayuya specialised in long range combat. Kimimaro was balanced in both types.
• Each member of the Sound Four tends to have a flaw in their personality that slows down the team: Jirōbō gets hungry and stays behind to feed, Kidōmaru tends to play around with his opponents if they interest him, Sakon can easily lose his temper and showcases the fact that he is the strongest of the four by not stopping until his opponents are dead, and Tayuya has a "doesn't want-to-lose" mentality.
• Kidōmaru was the only member to wear an Oto forehead protector.
• The Sound Four were playable characters in Naruto: Gekitō Ninja Taisen! 4, but they only appeared with the Second Stage of the Cursed Seal. Later, the Sound Four were playable characters in the Naruto: Ultimate Ninja 3, 4 and 5 with both regular and Cursed Seal forms playable.