Well, the thing about "primals" is that they're manifestations of their beast tribe's element, born with the summoner's will/cause/motive. At least, that's where I believe the primal's personality is based. Aether to make the body, prayer to give it spirit/purpose.
Small aside; Alexander is a manifestation of the Goblins, correct? So, to which element are the Goblins aligned? I'd circle G) None of the above. That established, Alexander is not a "primal" because he's not 'of an element'. The being possessing the machine the Goblins built/found/reclaimed is just an aetherial manifestation, like King Moggle Mog.
So, what could be causing the Goblins such grief? What mentality is the summoning party exhibiting; offensive, defensive or do they just want to see the world burn? Answer those questions and you'll have a pretty good idea of Alexander's personality and intention.
Unfortunately, we have nary a clue as to what the Goblins will be going through in the expansion, but try speculating more on their situation rather than directly stabbing at Alexander itself.