Another nice thing of VC4 is the extra squad member stories, as mentioned by siliconera:
In
Valkyria Chronicles 4, people have an opportunity to get to know their Squad E allies a little better. As character work together on missions and move up the ranks through regular use, Squad Stories will eventually unlock. These give you a side story starring these specific characters, sometimes only these folks, as they resolve an issue and tackle a map. Once its done, everyone involved’s Potentials improve and they generally become more useful.
First, you may wonder when you finally start to get to see these Squad Stories. They aren’t unlocked at the outset of the game. In order to get them, you need to use people together. For example, they unlocked when you finished the fourth chapter of
Valkyria Chronicles 4‘s first Battle of Siegval. Treading New Ground unlocked. This is a Squad Story specifically starring Aulard and Dan, though Miles makes quite a showing too, and is one of the easier ones to get since it only involves two people. You could also say it serves as an introduction to the formula, helping you learn how these play out. For the sake of avoiding spoilers, I am not going to go too much into what happens with these tales, but this first segment with Aulard, Dan, and Miles and the Like Old Times segment with Curtis, Eileen, and Laurent both do a good job of setting expectations and helping you see how enlightening and beneficial these can be.