The legendary archrival of Miyamoto Musashi. Raised by Kanemaki Jisai, after he is found as a baby in casket, floating on the ocean.
He develops an intense attachment to swords and fencing at an early age, possessing an almost preternatural ability to react to his opponents' moves.
Kojiro is deaf and mute, though still literate. His personality is very playful, almost child-like. Ittousai has also commented on the possibility that Kojiro's eyes have become better developed to compensate for his lack of hearing.
Kojiro is renowned for his "Tsubame Gaeshi" (Turning Swallow Cut) technique, inspired by the movement of a swallow in flight.

Haschwald is a Quincy affiliated with the Vandenreich. He's a member of the Stern Ritter and the right hand of Juhabach.

Chen Luo Jun was one of the baoli sergent until Boss order the killing of him and his men. After that, his flee to the city of darkness and prepare his revenge.

Agni is the God of Fire, who is known for his absurdly honest nature by all major Sura and Gods. Despite his billion years of age, he has a youthful and joking personality, usually referring to himself as "Babo Kim" (="Idiot Kim").
Agni is a rather carefree God, always playing around with Brilith Ruin. He rarely reveals his serious and thoughtful side, partially because he doesn't want to make Brilith unnecessarily worried.
Since he is a God, he has the power of Insight, a power he doesn't want to reveal to Brilith, because it would widen the rift between them, an event that Agni doesn't want to occur. However, this same power makes him able to understand human feelings, and lets him show his caring side to Leez, who was still crying after the loss of her family and village.
He's also the only God of Nature who sympathizes with the Suras, not initiating any fight or hunt against them, and actually helping some of them if given the opportunity.

Chen Luo Jun и Kojiro Sasaki