MegaMan Juno is a bureaucratic model, 3rd class and master of the ruins on Kattelox Island.

Deep within the Main Gate, MegaMan (Volnutt/Trigger) meets up with MegaMan Juno. The answers to many mysteries come together, and many new ones arise, yet there is little time to ponder them for Juno intends to "reinitialize" the island's systems. Simply put, MegaMan must stop him to save every single person on the island.

As the final boss of the game it is necessary for Juno to play the role of the ultimate villain, but what an unlikely enemy! He smiles constantly, and speaks calmly, logically and politely in a soft voice.