Skull face huh? Possibly enemy?
Hmm if this is not a side story gundam I would guess this mech will either be piloted by Ein (since it looks awfully sinister and the fact Ein seems to be the most blatantly evil antagonist currently since he's a little nuts) but I may end up being surprised (As IBO has sometimes surprised me before). I would love to see how this turns out especially since this particular mech is packing serious firepower I mean it appears the mech's shoulder cannons are so huge they have posts behind to help it stand.
the face reminds of astaroth