Ratchet

Ratchet is one of the suppporting characters in the Transformers franchise. He is one of the followers of Optimus Prime and a friend to Sam Witwicky. He usually helps heal the wounds of the Autobots, the Cybertonian species sworn to protect the human race. In the filma adaptation, Ratchet is their medic and mechanic. He can be somewhat insensitive to other people's feelings, and stating the obvious like he did when he could tell Sam's pheromone levels were rising and his interest in mating with Mikaela.