Reddie

Reddie, the Bloon Traitor is a Bloon Hero that fights on the Monkeys' side. It has a mini dart cannon strapped to it, which fires a steady stream of darts at Bloons.

Backstory
Reddie was once an ordinary Bloon named RED-1418. It took part in training sessions with its fellow Bloons that portrayed Monkeys as hostile monsters. After the training was finished, RED eagerly was dispatched into battle. However, battle was not like the training sessions showed. RED's team was swiftly destroyed. Panicking, RED slipped past the defences and flew into the town that was being defended. RED flew inside a house, expecting to find a stash of deadly weapons like the training had showed. Instead, It came face to face with a terrified monkey family, who knew that they were already dead. Realising all the lies that Bloonkind had given it, RED tried to run away from the battle, but was popped by a Dart Monkey. The battle was done, and RED lay, sagging and deflated.

While Monkeys were cleaning the battlefield from bloon fragments, one kind Monkey came across RED and took pity on it. They patched up RED and brought it into the town. From that day on, "Reddie" vowed to fight for the Monkeys.