I was also confused about who was who at this point if i remember, but after awhile it becomes clear once
Also, i mentioned this in another Turn A thread while back that no one got to. But, i think old man Sid is a tribute to Syd Mead, designer of most of the mecha. Because like, he's old just like Mr.Mead, and he is very into the mechanics and excavating, and of course the similarity in name.