Saver Series by Eun-Young Lee

Meet Lena Ha, a tough and beautiful girl who is also the captain of the Kendo team. Her skills in at swordplay will not prepare Lena for her realization that she has fallen in love with her long-lost stepbrother! Unable to withstand her emotions, Lena runs away and has a near-death experience that takes her to a new world, where her destiny is changed forever...

Lena wakes up in a stange, distant world, where she's taken in by a mystic seer who thinks she is there to be the savior! As Lena learns more about her potential destiny, she journeys deep into the heart of this mystical land in order to unlock its secrets--and more. But when she's intercepted by the evil forces lurking in the shadows, her fate may be sealed for all eternity!

Trapped in the Cave of Death, Lena and several men are suddenly released...to fight each other to the death as gladiators! Will Lena be able to use this to her advantage, escape her captors and free the others? Or will she meet her end before a bloodthirsty audience?

The cave is crashing in--and Lena, Cid, Sean, the merchants and "The Great One" are all trapped inside! But with the leadership of Lena's male alter-ego, "Ley," the gang may have a chance to escape. Even if they do make it out, it seems that something more terrifying awaits them at Glasgow Castle...

Originally published: Korea: Daiwon C.I., 2003.

When Ley and crew are captured by a bandit--who looks like Hyun-Min--they are taken to a town that’s surprisingly peaceful. Ley learns more about the bandit, who could possibly be her long-lost love from another time and place. However, peaceful days do not last as Yuriel leads his army to attack the town in his usual cruel fashion, killing men, women and even the children. Will Ley finally come face-to-face with the man who robbed her of people she loved?