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Shoichi Irie is initially an unsuspecting Japanese middle school kid who becomes caught up in the antics concerning Tsuna and his friends early on in the series, and ends up in possession of some Bovino family weaponry, including the Ten-Year Bazooka. However, in the story's alternate future story arc nearly ten years later, he is thought to be an enemy working for the Millefiore Family, but is in fact a spy for the Vongola. He is the captain of the White Spell's 2nd Rose Squad, and is also one of the Millefiore's six A rank members. He reports directly to Byakuran, and has been secretly researching the Ten-Year Bazooka in order to find a way to time travel. After confronting Tsuna and his friends, he reveals that he is on their side, with his past self being the one who has been bringing them into the future with the Ten-Year Bazooka, in accordance with a strategy that he, and adult Tsuna and Hibari have been planning.

Source from Wikipeida