A genius chemist, Mixmaster serves as a weapons designer to the Decepticon elite. He has spent his entire lifespan mastering the intricacies of chemical reactions, becoming an expert in poisons, corrosive substances, and especially explosives. He has a knack for improvisation, being able to make deadly concoctions from just the native materials a world has to offer. A member of the Constructicons, he forms the head of Devastator when the group combines into the lumbering beast.
There are at least two 'bots of his model; the other may or may not be also named "Mixmaster".