People always have to pay the price for their choices.
Adeline wasn't newly aware of this issue; in fact, she realized it the moment A·Gedora left.
The hero's party had already fallen apart. The once-loving, united group that could rely on each other for survival had splintered. She, who was always adored by others, now had to shoulder the burden of the Alchemist Association on her own.
She actually didn't want to do this. To her, what significance does the Alchemist Association hold? Being the leader of such a group wasn't something she was suited for—but where should she go? Should she seek out others from the party? Should she go looking for A·Gedora? Where does she belong?
She is the Source of Miracles.
When the alchemists naturally gathered around her, she finally realized that some responsibilities couldn't be avoided simply because she didn't wish for them.
At the very least, she wasn't strong enough to resist this invisible force.