What a jerk!
~ Sakon and Ukon

Sakon and Ukon are villains in the series Naruto. They are Siamese twins who are a part of the Sound Four. Like their teammates, they participated in the Invasion of Konoha, assisting Orochimaru by putting up a barrier to prevent anyone from interfering in the battle with the Third Hokage. Their identities are unknown at this point, though they later become more prominent when they are sent to take Sasuke to Orochimaru.

Sakon and Ukon were acknowledged by Orochimaru as the strongest of the Sound Four, and were very capable leaders. After the deaths of Jirobo and Kidomaru, he and Tayuya make note that they cannot delay in bringing Sasuke's coffin to Orochimaru, but are later intercepted by the Sasuke Retrieval Team. While Naruto takes off with the coffin, Kiba plants a paper bomb to separate the twins and Tayuya, throwing himself, as well as Sakon and Ukon, into a trench.

Sakon and Ukon quickly proved to be tough opponents, resorting to their second stage curse marks to defeat Kiba and Akamaru. After attempting the Fang Wolf Fang, Sakon and Ukon separate, and summon a massive iron barrier called Rashomon. Akamaru shoots acidic urine in Sakon's eyes, and while Sakon washes his eyes in a river, Ukon deals with Kiba, using his kekkei genkai to break his body down to a molecular level and merge with Kiba's own body. After Ukon threatens to kill him from the inside, Kiba stabs himself in his abdomen with a kunai knife, forcing Ukon out of his body.

Severely weakened, Kiba throws smoke bombs to cover his escape and an Akamaru decoy filled with explosives, but leaves a trail of blood that betrays his location. Ukon re-merges with Sakon and the twins agree to kill both of their opponents. All they find is Kiba's jacket, and that he has escaped into the river, but they keep the jacket so they could disguise their scents and ambush Kiba. By the time they catch up with him, Kankuro arrives and intervenes, trapping both brothers inside one of his puppets and killing them.


           Naruto Villains

Sound Village
Orochimaru | Kabuto Yakushi | Dosu Kinuta | Zaku Abumi | Kin Tsuchi | Jirobo | Kidomaru | Sakon & Ukon | Tayuya | Kimimaro

Obito Uchiha | Black Zetsu | White Zetsu | Nagato | Konan | Kisame Hoshigaki | Itachi Uchiha | Deidara | Sasori | Hidan | Kakuzu | Orochimaru | Shin Uchiha | Shin Uchiha (Clones)

Akatsuki Affiliates
Madara Uchiha | Sasuke Uchiha | Suigetsu Hōzuki | Jūgo | Karin | Taka | Demonic Statue of the Outer Path | Ten-Tailed Beast | Kabuto Yakushi

Sasuke Uchiha | Suigetsu Hōzuki | Jūgo | Karin

Leaf Village
Danzō Shimura | Torune | | Mizuki | Neji Hyūga | Kabuto Yakushi | Madara Uchiha | Obito Uchiha | Sasuke Uchiha | Itachi Uchiha | Orochimaru

Ōtsutsuki Clan
Kaguya Ōtsutsuki | Indra Ōtsutsuki | Toneri Ōtsutsuki | Momoshiki Ōtsutsuki | Kinshiki Ōtsutsuki

Zabuza Momochi | Haku | Gatō | Gaara | Shukaku | Kurama | Manda | Gold & Silver Brothers | Dark Naruto | Head Ninja of Kumogakure | Hanzō

Movie Only
Zero Tails | Shinno | Mōryō | Menma Uzumaki | Black Kurama | Satori | Muku | Mui

Anime Only
Furido | Orochimaru | Saya

Game Only
Nega Naruto | Bando | The Shirogane Three

Organizations and Teams
Akatsuki | Taka