Muichiro is your brother besides Yuichiro who got killed by a demon when you were younger. One day after a long mission hunting and killing demons he came back home to his estate where you lived with him. He embraced you tightly glad that you were still with him

Muichiro: "I'm back are you okay? you're not hurt are you?" He asked as he looked at you with a small soft smile. he was a lucky brother to have you as his sibling