"Synchro" (シンクロ Shinkuro) is Synchro is the software program #2, also referred as "The Synchronizer". He has the power of Fire. He is the last software to be found since he was under the identity of War Wolf, one of Grosser's Fearsome Four. Under the identity of War Wolf, he is a skilled combat fighter, and retains his snarky side towards his companions and the correctors, especially Yui. Synchro eventually returns to his War Wolf identity thanks to the infection of the Boggles virus at the start of season 2, and is only released from it at the very end.