Agari Kaisen

is the head of the Kedōin clan and is an old friend of Tsunade.

Imposter Arc
Agari first appeared when Tsunade gave Kiba, Hinata, and Naruto a mission about finding the treasure for Agari. Then he appeared when the trio were kidnapped by Agari's three clan members who had copied their appearance. Then Agari and his subordinates left the three and went to crush Konohagakure. But after Agari and his clan members left, Naruto, Kiba, and Hinata managed to free themselves, and caught up with Agari, and defeated him and his clan members. But at the end of the arc, the mission was revealed to be a test for Naruto and the others. He also left Tsunade a bill.