The Archduchy's Fierce Little Captain

After meeting her untimely end during military training, Special Forces captain Jeong Yunseo wakes up inside a fantasy novel as a doomed five-year-old supporting character named Rudia. Armed with the knowledge of the story's future, she escapes her greedy uncle and finds refuge with the family of a powerful Archduke. But changing the future is easier said than done. With a reluctant fiancé, a venomous beastman, a prince destined to kill her, and many others standing in her path, will Rudia's military instincts be enough to rewrite her fate?

(Source: Webtoon Entertainment)