Chuukichi

Chuukichi (中吉, Chūkichi) was a famed Kirigakure shinobi.

He was a well noted shinobi during his lifetime, enough to justify his inclusion as a sensor and a backup within Akatsuki's Surprise Attack and Diversion Platoon, alongside Deidara, Sasori and Shin.

Manga Debut: Chapter #516
Anime Debut: Naruto Shippūden Episode #261

(Source: Narutopedia)