Seeing that there weren't any abnormalities in the town of marionettes, Klein began thinking about Miss Justice's encounter.
It wasn't Adam who set up an attack against Ariehogg, but Hermes who masterminded it?
Otherwise, it wouldn't be possible for Adam to not descend. It would also be impossible for Ariehogg to escape so easily. "He" had to rely on the second City of Miracles to have some hope of doing so.
If Hermes was the mastermind, the development of this whole episode becomes logical… Hermes never thought of capturing or killing Ariehogg. "He" only hopes to learn some information from this ancient mind dragon. When Ariehogg said "Adam isn't necessarily Adam," the operation came to a natural end.
