Kairu is a young man who was orphaned due to the Cursed War which took place in Bel Lenora twenty years ago. After the war he was adopted by Duke Averay who raised him as his son alongside his biological daughter, Aurora. Kairu and Aurora grew up to be best friends despite having very different personalities. Unlike everyone else in Bel Lenora, Kairu does not possess magic. This makes all the denizens of Bel Lenora afraid of him, as they fear he might also bring war, just like General Vai did twenty years ago who did not possess any magical powers either. Despite not having magical powers, Kairi is still an excellent swordsman, and the best of his class at Duke Averay's knight school. He's a very strong character and is able to wear most armor.