Takamaru was an Iga ganin.
His master was killed by Oda Nobunaga's men and Koga ganins who had joined them. He and Kikumaru ran with the secret technique scrolls of Itou while Akame stayed to delay the enemies.
He eventually stayed with Akame, Kikumaru and master's son Kotaru. The Itou family carried on existing.
See more pictures in Takamaru/Gallery