"hi! I'm koki aoi. It's a pleasure to meet you...." Koki bears a striking resemblance to his father, as he has spiky burnt orange hair and big blue eyes. The outfit he's seen in for his first introduction is a green hoodie with blue jeans and black shoes. Outside of that, he's seen in other clothes as well. Koki is the 6 year old, first born son to Tōichirō Aoi and Sanae Aoi. Sometime later, his mother became pregnant and gave birth to his younger sister, Hina.