He is based on the actual Kagehisa, the legendary swordsman who helped found Itto-ryu and was rumored to have never lost a single battle.
He always put up his hair in a low ponytail and people tend to describe him as slit-eyed or narrow-eyed.
He is usually calm even at difficult times but lets his real feelings show when he's with Makie. He can be sarcastic when he speaks and meets up with Rin.
As a child Kagehisa is shown to have great dislike for the Samurai code of honour: Bushido. The fact that samurai were willing to give up their lives and sacrifice those close to them in order to preserve honour and save name or face disgusted him. The eagerness which samurai have to die to preserve honour pissed him off. This is most likely due to the fact that his grandfather was cast out of Mutenichi-ryu dojo after using a foreign sword and demonstrating poor style during a bandits' attack.
After his grandfather was cast out, he became hateful and became abusive towards Kagehisa. Under his harsh training, he grew disillusioned with putting concepts like "honor" and "good form" above victory at any cost. At the age of 22, Kagehisa leads the Itto-ryu in order to form a dojo dedicated not to form or rules, but to the simple test of superior lethality.
Anotsu Saburo Edit
After Saburo was cast out of the Mutenichi-Ryu dojo, he became hateful and abusive towards his grandson, Kagehisa. Under Saburo's harsh training, he became disillusioned with concepts like "honor" and "good form" above victory at any cost.
Makie Otono-Tachibana Edit
To Kagehisa, Makie is the finest warrior and his childhood love. She's considered by many elite swordsmen and warriors to be lethal, even to them. Kagehisa is only second after Makie in skill with the sword. She is also his cousin.
Magatsu Taito Edit
Kagehisa is Magatsu's superior and his ally. Kagehisa seems to have some form of respect for him, as he lets him leave and rejoin the Itto-Ryu of his own will.
Asano Rin Edit
Kagehisa was the one who ordered the death of Rin's father and let his men raped and killed her mother. Because of this she swore to kill him, one day.
Manji is considered to be Kagehisa's equal in terms of fighting skill.