Ashton no longer had any reason to stay within the Celestial's Camp. Well, he didn't have a reason to stay there permanently at least.
Since he already knew what he wanted to know, there was no reason for him to stay there. He could just visit from time to time to check on Hilda.
He returned to the ground and parked the library at an inconspicuous spot within the Warzone, then he stopped worrying about it for now.
Admittedly, there were things that Ashton wanted and needed to do but none of them are achievable right now. He need to become a little bit stronger first before he even dared to take action.
Ashton was tempted to go out and go on a killing spree again. He wanted to remind both enemy camps of his presence since they've had their guards down already but in the end, he prevented himself from doing that.
Maybe he could do that later, for now, he had to organize his thoughts...