Oyone

Oyone is a medical-nin and a researcher of Konohagakure.

Invasion of Pain arc
Just after Pain started to invade Konohagakure, she along with Shizune and Kumadori. She was given an object that had to be identified, and it turned out to be a chakra receiver. Worried, she gives the receiver to Shizune who runs to tell Tsunade.