Moon

Despite being a transforming bunny rabbit, Moon is not of Cybertronian origin, but is a relic from the past of Gaea (future Earth). He is stationed on the moon along with his partner, Artemis. Together, they watch the battle unfold between the Cybertrons and the Destrons, gathering data in secret. He also ends every sentence with the word "moon".

Moon's special ability is the power to become invisible. He's also remarkably good at saying things that upset Artemis. He's not so good at avoiding the giant red mallet Artemis swings at his skull when she's upset, however.

(Source: Transformers Wikia)