Responses
Because she’ll eventually want to bring back espers from this kingdom to Korea like the first time around. She’s moving back and forth for her own personal benefit, and even exclaimed that every time she came back to Korea after being in the empire her rank went up.
With a selfish person like that, of course she’ll keep going back and forth till she’s an S rank guide, monster waves be damned.
Hm but there were really no reason to refuse? She told you she doesn't care about this empire and will go back. That's what you need. Why the long face and morality talk?