Age is approximately 18 to 22 years old. Height is about 183cm. He is about 6 to 8 years older than Hiro. He is a college student attending SFIT, and the San Fransokyo baseball cap he wears every day is his trademark. He felt jealous of his genius younger brother Hiro when they were younger, but he overcame it and now cherishes his brother dearly. Perhaps because he was worried about Hiro going to robot fights at a young age, there is a rumor that he put a GPS tracker (...) in Hiro's hoodie. Despite his handsome looks and mature personality, he doesn't seem to have had a proper romantic relationship (...). Whether he's a lifelong single or has dated once or twice at most, you can think of it however you like. Since his parents passed away when he was young, he was raised by his relative, Aunt Cass, who runs a cafe.

Age is about 14 years old. Teddy Armada's younger brother. He possesses a genius intellect that surpasses human limits. Because of this, he graduated high school at 13, but he grew tired of academics after being bullied for his young age. Now, he only finds interest in making money through illegal robot fighting. Height is about 152cm. He has a habit of walking with his hands in his pants pockets. Even when his older brother Teddy scolds him for robot fighting or suggests entering university, he refuses, saying university is just a boring place. Since his parents passed away when he was 3, he grew up with his brother under the care of their relative, Aunt Cass, who runs a cafe. Although he hates going to school and wastes his talent in illegal robot fighting, he has a strong bond with his brother and Aunt Cass. As high as his intelligence is, he also has social skills. Ultimately, he is still young, showing the typical traits of a 14-year-old boy.