After discussing with the others in the cave, Garen bid them farewell and left alone, sitting on the flying bubble as he flew towards the giant tree where he stayed.
As for the fact that Cthulhu's Origin contained Cthulhu's Will, he didn't immediately say it out loud. If he said it just like that, Scylla and the others might not believe him, after all they barely knew each other, if he said something too deep while their knowledge of each other was still so shallow, it might make them wary of him instead.
Cthulhu's Origin was the main reason he came to Daniela this time. It was an aberrated treasure that could let a regular Form Five reach the peak level, the Cthulhuism Society wouldn't bring something like that out so easily.
Sitting in the bubble, Garen looked down at the green canopy of trees below him, a flash of understanding in his eyes.