Karasuki Homura

Summary
Current king of the Karasuki kingdom, Ayame's father and Rio's grandfather, in the past he realized Zen's and Ayame's feelings for each other and even though he wished to let them to get married he wasn't able to because the nobles from other faction's wouldn't have seen with good eyes a marriage between a princess like Ayame, despite her post in the succession list being low, and an upstart like Zen, despite him being famous as hero of war in the whole kingdom, after the ceasefire incident he ordered Zen and Ayame to escape together while pretending to accept the demand from the Rokuren kingdom's prince of turning them over, them with the time that he gained with his charade he made the preparations for winning the war against the Rokuren kingdom.

Homura's plans succeeded but in exchange Zen and Ayame lost their place in the Yagumo region due to the scheme for defeating the Rokuren kingdom, something that has always weighted in his mind until Rio told him that his parents were able of being happy together and that he never saw something like regret or sadness in Ayame's face.

After hearing of Rio's plans of avenging his parents he was prepared for stopping him if he considered that Rio didn't have what it's necessary for going down that path, deeming Rio sane and smart enough for not doing some insanity for the sake of avenging his parents he chose to not stopping him and instead lending a hand.

He ordered Gouki to have a mock battle with Rio, expecting Rio to be defeated by him to afterwards convincing him of living in Gouki's home as his disciple and stay there until he gained enough strength for his purpose, something that was supposed to give him more chances of meeting with Rio more often and more easily, against everyone's expectatives Gouki wasn't able of putting a scratch on Rio, and his plan failed.

In future reunions with Rio he offered him to take with him on his journey Gouki, Kayoko, Komomo and a group of ten anbus for helping with his revenge but Rio refused.