This is Ryu, Araki's childhood friend
Ryu was found as a baby in the forest by Urokodaki. Urokodaki immediately recognized from his aura that he was a dragon-human (dragons that can transform into humans), but Ryu can only transform into a small dragon. One day, when Araki was 5 and Ryu was 6, Araki had to stay with Urokodaki for two weeks. That's how they met. They are best friends and a bit of a rival (maybe more soon 🤭). When Ryu transforms into a dragon, Araki carries him on her shoulder. He is 15 years old.