Dion Alaia

Home town: Tearmoon Empire

The imperial army's mightiest swordman. His skills as a mercenary earned him an official rank in the imperial army, where he could become a squadron captain of 100 soldiers.

In the previous timeline, Mia's selfish desire for a jewelry box sparked a conflict in Sealence Forest, resulting in a tragedy that killed all of Dion's subordinates. Soon after the revolution broke out, Dion sided with the revolutionary army's cause, where he played a major role in bringing down the imperial army by slaughtering famous generals with his sword. The man only sought one thing as a reward for his stellar contributions, princess Mia's head. Ultimately, he got what he was looking for and became Mia's executioner at the guillotine.

In the timeline of the main story, his first encounter with Mia was so abrupt for her that she panicked and promptly passed out on the spot. Having experienced his mercilessness directly and all, Mia is completely terrified of him.