Kim Hye-jin has been soloing a lot of dungeons.
It wasn't concerning at first, because it made sense as a way to take power back from the people that tried to kill her, be powerful, and at the same time give every other exhausted esper after the confluence a break.
It's now perhaps starting to get concerning.
Outwardly, though, she... seems fine? Just really work focused. Distant towards everyone, maybe.