GAIA was not a god, or AI, who felt nothing for people. They wouldn't show so much concern for Eldrian and others if that was the case. An unsympathetic deity would certainly not take care of Ashliel through creation itself.
Carrying out Miracle's ruthless orders must certainly weight on the deity. Eldrian understood they were not directly involved in the day to day of people's lives, only maintaining the entire simulation. But that meant GAIA was responsible for the chaotic storms pushing the devils into the empires. They controlled the rate of the invasion.
It must truly place an immense strain on the deity's conscious. Perhaps they could compartmentalize it; they must have a way to deal with it. But that they had to deal with it was bad enough.
This made it even harder to accept that GAIA was willing to talk with Miracle after everything. 'They must feel so trapped... but it surely is better than committing to a war.'