The Legend of Heroes: Sen no Kiseki - Northern War: Season 1

Lavi is a girl born and raised in North Ambria State, the poorest region in the northwestern part of Zemuria. To protect her hometown, and to prove she is different from her grandfather Vlad—who was once hailed as a hero, but betrayed North Ambria—she volunteers to serve in the renowned Northern Jaegers, the largest jaeger corps in the continent. Devoted to her duties to the point that she repeatedly breaches discipline, Lavi is grouped into a platoon with Marty, Iseria, and Talion and ordered to undertake a reckless undercover mission into the Erebonian Empire.