Kabuto Yakushi (薬師カブト, Yakushi Kabuto) is an antagonist of the series, originally introduced as Orochimaru's personal medic, assistant, and general right-hand man. Later in the series he joins forces with Madara Uchiha during the Fourth Shinobi World War.He is a very skilled ninja in medic art and later take over the powers of OROCHIMARU and makes them even more greater.