I've only read the web novel, is don't know if it's different in the LN
I thought the army of combat related dolls was made by Myne (at least it was her idea and the dolls were probably made by her aides) to proect Ehrenfest's Temple before setting out to attack Arensbach to save Ferdinand. But the orginal goal was to make an army of dolls to help her manage a libary.
I've only read the web novel, is don't know if it's different in the LN
I thought the army of combat related dolls was made by Myne (at least it was her idea and the dolls were probably made by her aides) to proect Ehrenfest's Temple before setting out to attack Arensbach to save Ferdinand. But the orginal goal was to make an army of dolls to help her manage a libary.