Jiraiya was one of the legendary Sannin, along with Tsunade and Orochimaru, who was trained by the Third Hokage. He was a self-proclaimed super-pervert, and wrote a popular adult fiction book series, called Icha Icha -- a favorite of Kakashi Hatake. He was also known as the Toad Sage (Gama Sennin), because of his signature toad summonings and his status as a sage. Jiraiya had the kanji character for 'Oil' (Abura) on his customized forehead protector, Jiraiya was killed in battle with Pain.
