Yūdachi

is a missing-nin from Amegakure. He and his partner Ryusui are looking for a drink when Jiraiya lures and captures them in his toad. When the Ame-nin refused to tell Jiraiya any information on Pain, the Sannin uses a feather to tickle-torture Yudachi into giving him the info. When this failed, Jiraiya transformed Yudachi into a frog, which cowarded Ryusui into divulging info about Pain.

Later after Jiraiya's death, Yudachi is taken to Konoha to gather information about Pain. It is found out while probing his mind that he used to bring dead bodies to Konan, not knowing what they were being used for. His fate after Pain unleashed his Shinra Tensei on Konoha is unknown.