The Legend of Heroes: Sen no Kiseki - Northern War (2023)

Lavian Winslet lives in North Ambria, the poorest state in Zemuria. To protect her homeland, she enlists in the notorious Northern Jaegers. But even there, her bad family reputation haunts her, for once her grandfather Vlad, who was considered a great hero of the land, was unmasked as a traitor. To prove that she will not follow in his footsteps, Lavian takes on even the most impossible challenges to defend those she loves.

One day, she is ordered to join Martin S. Robinson, Iseria Frost and Talion Drake on a dangerous espionage mission to Erebonia Empire to gather information about a new potential threat that threatens to descend upon North Ambria.

Source: www.anisearch.com/anime/16032