AZ-345211896246498721347 or, for short, AZ-3, is a droid from the last season of Star Wars, The Clone Wars, ( a.k.a. The Lost Missions ), who helps ARC Trooper Fives with his " Order 66 " mystery.
I know, but they could have at least finished up season six. There were a few things they didn't tie up, but I'm assuming they've addressed those in Rebels season two (haven't seen it yet).
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Wolveon
I wish they had continued with TCW instead of dropping it and starting Rebels..