Valkyria Revolution

Pops at the end of the mission fighting Valkyria, after the Gilouche mission in chapter 10. It's a two part battle - the first is similar to the previous encounters with her. She will have two orbs floating around her and they will change during the battle. She is weak to the opposite color of each (blue-red and brown- green). I was able to do decent damage with Amleth's regular attacks as well.

Cutscene, then the second battle. She has no orbs but seemed weak to anything. This battle went quickly with regular attacks with Amleth. Both battles were much easier than the various Grand General battles to this point. I was almost 20 levels below her - she was 70.