Naturally, Shien had no idea that even before making contact with him, Maki had already infiltrated the Elven Village and met with Merika.
This had been both to investigate Shien and the others and to plant some contingencies for when she faced Shien in the future.
So, Maki had used Mental Magic at the time to control Merika, making her reveal everything she knew.
That was why Maki knew so much about Shien and had clear intelligence on every person around him.
Afterward, Maki had also planted a portion of her mental power within Merika's body, intending to manipulate Merika again when necessary and turn her into a puppet to do her bidding.
After all, she was opposing someone backed by Demon Lords and an Evil God. Maki might have had a vile personality, but she still made the preparations she needed to make.
Had nothing unexpected happened, then when Shien and Aiyi threatened Maki, that Demon Spirit would surely have played this card, controlling Merika and making her do something that would allow Maki to escape alive.
Even using Merika as a shield to block Aiyi's Dragon Breath would have bought that Demon Spirit an opportunity to flee.
It was because she had such preparations that the Demon Spirit had dared to openly oppose Shien, wasn't it?
Otherwise, for a mere Legendary-tier mage to make a move against Shien, who had Demon Lords and an Evil God by his side, would truly have been suicidal.
Unfortunately, that Demon Spirit had never imagined that the contingency she had prepared would vanish into nothingness because of an accident.
She could never have imagined that Shien would so beastly push Merika down, much less that Merika would undergo earth-shattering changes as a result and be taken back to the Divine Realm by