* Scrapper: The leader and primary torso.
* Bonecrusher: The left arm.
* Scavenger: The right arm.
* Mixmaster: The left leg.
* Long Haul: The right leg.
* Hook: The head.
Therefore, no single individual "transforms" Devastator. Instead, the six Constructicons individually transform into their component parts, which then physically merge to form the combined form of Devastator.