Yōrō

is a jōnin of Takigakure.

Naruto's Back: Friends' Tracks
Yōrō and Kegon were instructed by Shibuki to hide their jōnin status, and protect Fū while she's attending the Chūnin Exams in Konohagakure.

Trivia

 * In the credits of Naruto Shippūden Episode #396, he is listed as.