Originally Posted by Drayvhen

Im not 100% sure about what it is, but Im keeping them for "World Defensive Battle Scenario" that should appear someday. I think its nationality locked.

Exactly. Each day of the week you get maps from a different country and you can only bring in the girl from that nationality. The stages aren't that hard though. As long as you have 3 or 4 strong girls from each nationality you'll probably be fine. Also, you can choose any helper squad, regardless of nationality, so that helps out a bunch too.

Originally Posted by Rupturez

You already maxed the affection of every 2 and 3* as well already?

Yes I have T_T
I farmed Lavender's event pretty hard and it dropped lots of gifts, plus good gold and exp <3 it was beautiful <3