of Takahiro. Ojisan refers to himself as a bum, and seems to regret not pursuing a relationship with Sensei when they were younger. His real name is never given. An older woman, she is a doctor for both humans and androids. She was involved in the creation of the A7 series of robots, and hosted Director Alpha in her home, possibly as Director Alpha's owner. When she was younger, she rode motorcycles and raced hovercraft, and was Ojisan's senpai from school. Her surname is , but she is always addressed by just her title. She tells Kokone that she is also involved in creation of Misago. The grandson of Ojisan, who lives with his grandparents. He meets Alpha at age nine, and she quickly takes to him as if he were a younger brother. He is the first character in the series to meet the Misago. As he grows up, Takahiro becomes fascinated with engines of all types and eventually moves away in his mid-teens to work for Nai. A girl a few years younger than Takahiro. She likes Takahiro and is initially jealous of Alpha. Makki eventually becomes close to Alpha after learning the latter would never consider having a relationship with Takahiro because mortal humans move through time in a different way than immortal robots. She is skeptical of Takahiro's stories of the Misago until she meets the wild-woman herself. In her early teens, Makki works for a while at Alpha's café, before moving away to become a courier with Kokone's company, and then later to Hamamatsu to be with Takahiro. An ageless wild-woman who lives in the inlets and bays near Café Alpha. She is always naked, and eats raw fish, crabs and insects caught using her short fangs and inhuman speed which enables her to run on water and easily jump 10 metres high. She only shows herself to young children, and shies away from contact with adults. She does not age and, according to omake material, does not understand how children grow up. While Ayase claims she existed "decades before" robots were created, it is later implied by Doctor that she is the first robot. Despite Misago's feral nature, she is a gentle person, and does not cause harm to anyone beyond accidentally scaring some of the children she encounters. Ayase A wanderer who travels endlessly, relying on his kamas (a large predatory flying fish)