The Crimson Blade

Yeo-Ran is a wandering warrior, whose sole mission in life is to find the demon that killed her father. One night, she finds herself warped into the demon world, having to save Princess Ja-Ha from being married off to the Demon Master. There, Yeoran discovers traces of her father, bringing her one step closer to finding his killer. To find more answers and fulfill her lifelong mission, Yeo-Ran becomes Princess Ja-Ha's bodyguard. Will Yeo-Ran finally be able to find closure? (Source: WEBTOON)