Hello, I have come to the Ukaizo, siding with Republics and director Castol, but the guardian is missing and I have to fight only with the colosses. Also there is no dialogue with the guardian. (Scyorielaphas from Neketaka helped with him during the ship battle)
I reloaded and went to the Ukaizo on my own, so the fight with the guardian took place, Scyorielaphas had not come in this case previously.
Well, the question is, that's a bug? Or the part of the story, that Ukaizo guardian is stopped by Scyorielaphas? As I remember, you had to fight anyway, at least before the patch 3.