Kakkō

was an Iwagakure ninja that appears in the Kakashi Gaiden arc. When he felt the team of Kakashi Hatake, Obito Uchiha and Rin coming near, he and his comrade Taiseki attacked them and captured Rin. Kakko used a genjutsu on Rin, trying to get information out of her, but it didn't work due to Rin's strong will. Later, Kakashi and Obito came to save Rin. Kakko created a cave-in to trap the three Leaf ninja. The falling rocks crushed Obito's body, later causing his death. Kakashi escaped and killed him with his Chidori.