After the meeting within the ninth army, Mervin, who was responsible for communication, contacted the guides association and the families of all the guides they rescued.
They held a lot of meetings afterwards, but it was no longer necessary for him to be in the meeting. So, he started going back to his laboratory to continue making potions with the materials they got from Planet 125.
All the material they gathered from Planet 125 was in his laboratory. He also had a lot of samples from the herbs he didn't need for the potion he was making. He should be able to study them after making all the potions he needs for the tests.
He would also sometimes visit the guides to check in on how they were doing together with Lyre, who was currently tasked with group guiding guides. It might not be as effective as himself, but Lyre was also an S level guide, so his guidance was still effective to some extent.