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Voiced by: Ohsaka Ryota & Satou Rina (Child)
The main protagonist with high intellect and a photographic memory. Ryouta has sights to be a researcher at NASA due to a promise he made with his beloved childhood friend Kuroneko. He is president of the astronomy club and was the only remaining member before inviting Neko and the others. After meeting the magic users, he decides to provide shelter to them at an old abandoned observatory despite knowing that their pursuers have orders to kill whoever comes in contact with them, usually coming with plans to have their location concealed. Looking for ways to provide the medicine, a drug "Death Suppressants" (DR623G), they need to keep living while helping them to live their lives as normal as possible.