Jiraiya is one of the three powerful ninjas who originated from Konoha (village hidden in the leaves) and trained by the third Hokage, Hiruzen Sarutobi. His two team mates were Tsunade and Orochimaru. Later on, they became known as the Legendary Three Ninja, also known as "Sannin." Jiraiya is also a full-pledged pervert. He adores good looking women and gets distracted by their sight often. He often gives the reason that he is doing research for his writing. Jiraiya is the author of the Icha Icha Series which Kakashi loves to read. Among other traits, he is a toad-tamer, with the ability to summon powerful toads at will to aid him in battle. He holds a key part in teaching and training Naruto.

Sawamura Eijun comes from the prefecture of Nagano, where he played baseball for Akagi middle school. He was scouted to play baseball for Seidou High School which is located in Tokyo, and is now a first year there. Sawamura is a left-handed pitcher (aka, "southpaw") who also bats with his left. Sawamura's strengths are his infallible spirit, bunting, infield defense, and his idiosyncratic pitches. His weaknesses are batting, outfield defense, and his control. Outside of baseball, his hobbies are catching beetles, fishing, and watching sumo.