The Legend of Heroes: Trails From Zero, #65 - We Need You, Elie 

And we finally got backstory for Elie. She definitely chose an uphill fight to have. But it is a worthy one for sure. No one escapes Lloyd's cheesy influence, not even the players. Soon enough you will start spitting cheese instead of bars.

The two superpowers, and Crosbell caught in the middle, tied by the laws Erebonia and Calvard made for it. Even Revache and Heiyue are aligned each to one country. Actually the CDF is a reference to the Japanese SDF after wwii, self-defence force, not a "real" army because it was not allowed to be affter losing, just like Crosbell isn´t alllowed to have a real army, just the "Crossbell Defence Force, CDF". Still, it´s very screwed up that Elie´s parents get divorced and neither of them keeps the child wtf. The combination attacks are just that, dual S-crafts that spend 100 CP of the 2 people involved. Soome of them are quite good, and the "relationship" system affects them IIRC, I think they get upgraded with the one you have more affinity with.