Naruto's darkest Sannin wielded more than just forbidden jutsu and snake summons. Orochimaru constructed his criminal empire through calculated cruelty, transforming prisoners into devoted warriors through brutal survival trials. His inner circle consisted of four exceptional shinobi who emerged victorious from deadly battle royales designed to eliminate the weak.
The four bodyguards shielding Orochimaru in Naruto are Jirōbō, Kidōmaru, Sakon and Ukon (counting as one position), and Tayuya, collectively known as the Sound Four. These elite sleuths from the Hidden Sound Village operated as both personal caretakers and executors of their master's most crucial missions, ranking among Otogakure's most dangerous combatants.
The Sound Four weren’t originally devoted followers of the legendary Sannin—they were brought into Orochimaru’s service under different circumstances. Originally, they were prisoners forced into brutal survival competitions. Orochimaru subjected them to deadly battle royales where only the strongest could survive. Through these horrific trials, they proved their worth and earned their positions as his trusted bodyguards.

Before becoming the Sound Four, the group actually worked as the Sound Five when Kimimaro acted as their leader. This bone-wielding warrior easily dominated all four members in combat, establishing the hierarchy within Orochimaru's inner circle. However, Kimimaro's terminal illness forced him to step down, returning the group to its four-member configuration.
Meet the Individual Members from the Naruto Series
First is Jirōbō, who had massive bodily power and earth-based abilities that made him a tough opponent. His massive build and raw power allowed him to overpower enemies through brute muscle. However, his weakness lay in his proneness to become distracted by hunger during battles, usually stopping to feed when he should have stayed focused on battle.

Second is Kidōmaru, who exhibited outstanding intelligence and tactical thinking throughout his appearances in Naruto. With spider-inspired powers and clever web traps, he created lethal setups to take down his foes. Despite his strategic mind, he had a fatal flaw of becoming too inquisitive in challenging opponents.
Third is the twin brothers Sakon and Ukon in Naruto, who shared a unique body-sharing ability that allowed them to combine and separate at will. Sakon generally took the lead role while Ukon provided aid from within their shared form. Their fused fighting style made them unpredictable opponents, though Sakon's hot temper and desire to show off with flashy techniques sometimes compromised their usefulness.
Tayuya, the fourth member, used her cursed flute to cast powerful sound-based illusions and summon beasts in battle. Her fierce drive and unwillingness to lose pushed her beyond her limits. Among the Sound Four, she contended to be the second strongest member, placing her abilities just below Sakon and Ukon's fused power.
Key Fights and Missions of Sound Four in Naruto

During Orochimaru's raid on the Hidden Leaf Village, the Sound Four played a vital role in defending their master. They erected an emphatic hindrance that thwarted anyone from meddling in the legendary battle between Orochimaru and Hiruzen Sarutobi in the Naruto series.
The Sound Four's most important mission was to recruit Sasuke Uchiha for Orochimaru's body transfer ritual. They successfully persuaded the young Uchiha to join them by exhibiting the power of their cursed seals. This mission finally led to their downfall when Konoha's retrieval team hunted them to bring Sasuke home.
The mission to retrieve Sasuke in Naruto ended up being disastrous for Orochimaru’s top enforcers. One by one, they fell to Konoha's bound genin. Choji Akimichi defeated Jirōbō by taking dangerous chakra-enhancing pills, which pushed him to the brink of death. Kidōmaru met his end against Neji Hyūga in an extreme battle that showcased both fighters' tactical capacities.
Tayuya, along with Sakon and Ukon, nearly overpowered their foes until reinforcements from the Sand Village arrived and turned the tide. Temari defeated Tayuya with her wind techniques, while Kankurō's puppets proved too much for Sakon and Ukon. Their deaths marked the end of Orochimaru's most trusted escort party.
In the end, the Sound Four in Naruto described Orochimaru's ideology of using power to control others and warp them to his will. These four warriors - Jirōbō, Kidōmaru, Sakon and Ukon, and Tayuya - acted as both a guard for their master and a symbol of his persuasion over others.