Veronica here can serve as a powered armor infantry and possibly a combat engineer. Hopefully (for her) her fists count as weapons, but if not, she can adapt. She's got a decent amount of combat under her belt, and provided she gets along with her CO, she follows orders well enough. If not, well, they can expect a looot of order-questioning.

Shoutarou might work for this as well - maybe a scout or a driver-gunner. He's got access to, of all things, a tank attachment for his motorcycle, and a motorcycle with guns mounted on it.

Lina could be useful here, too, as a battlefield caster.