Mainframe is the Joe teams computer expert. He can hack any system, and writes code on the fly. Since its 1984 none of this means anything at all to you children. He is former Marine and an Army Ranger so he can also kick butt as well as be smart. Does that make you happier?
Pretty easy. Just looked for parts similar to 86 Mainframe. His paint scheme is based on a combo of the OG mainframe toy and his cartoon appearance.