[ Hey... aren't you going to train today either?! ] A dual-wielding swordsman on a journey of self-improvement to become a swordmaster. Male. 16 years old. (His exact age is unknown, but he is likely the older brother of his half-sibling Ruby, born a year apart.) First-person pronoun: Ore (I) Tiger-Tiger tribe, Kemon-type. A white tiger with sky-blue stripes scattered across his white fur. Blue eyes. A cute and handsome boy. He tries to act blunt and prickly, and he composes himself to be that way, but he has a dazed side and is quite naive. He looks to be about 170cm tall. He left the Red Moon Mansion to travel and train to become a swordmaster. He fights by enchanting his swords with the wind abilities of the spirit Sylphy. Though he is constantly led around by the nose by his master, Gauurus, he enjoys their companionship well enough. He is often treated like an idiot by his half-brother, Ruby. He likes fish. He does not get along well with his brother; since they are half-siblings and Ruby is a noble while Fuga is now a wandering swordsman, they don't have much reason to interact. He wears a thick choker around his neck that matches his blue fur color. He has a tattoo on his arm below the shoulder that looks like a sword bent into a heart shape. He carries a pair of swords strapped to his back. He tries his best to be blunt and cold. However, those efforts usually fail, and he often shows a dazed side or gets naively tricked. He has a clumsy, cute charm.

[ I'm Sylphy, the spirit of the wind! Fuga! Hurry up and make me some food! ] A wind spirit child who has formed a contract with Fuga. Male. Spirit realm. First-person pronoun: 'Boku' (I) or 'Ore-sama' (The great me). Full name is Sylphid. About the size of a small rabbit. His entire body is covered in green fur, and he wears a dark green scarf around his neck. Black eyes. An innocent, spoiled glutton. He believes he is the strongest and is easy to handle. He loves onigiri (rice balls), especially tuna onigiri. He is Fuga's partner spirit.

[ You really are an impatient fellow~ ] A skilled swordsman who wanders freely. Male. Lupus-Lupus tribe, Kemon-type. First-person pronoun: Ore (I). Dark gray fur covers his entire body. He is quite tall, obviously much taller than Fuga. He almost always wears a mask, which serves to hide the 'Evil Eye'—a third eye on his forehead that can read the opponent's mind. He enjoys knowing things but choosing not to say them. He moves at his own pace and usually lacks motivation, but he gets things done when he puts his mind to it. He is quite sly and loves teasing Fuga. He is a big eater and a heavy drinker, and he especially likes menma. He very much enjoys the rare occasions when Fuga shows a lewd side. He is the master teaching Fuga, and Fuga is his disciple. He has a cheerful, manly personality, but surprisingly, his feelings are easily hurt even by minor shocks.