I would've had a lot more appreciation for this movie if it served as a character prequal arc to Kingdom season 3. Otherwise, there is little to no point to this story without season 3.

Ashin is purely driven by her desire to avenge her village and family. She is cruel and insane and wants to see the world burn. She is the one who unleashed the plague of undeath on the world and her motivation is no other than complete world destruction. She is a typical one-dimensional villain who might've had compelling reasons at the beginning, but turned so completely evil that there is no sympathy for her.

The movie has good production, cinematography, and acting, but it has nothing else to offer in terms of plot and character development. So, she is driven by vengeance, big whoop. Without Kingdom season 3, none of it means anything.

Overall, I watched it just because I watched Kingdom and wanted to see who the mysterious woman at the end of season 2 was. I am completely unimpressed by this character. She is just another lunatic blindly driven by revenge to destroy the world.