He is a slender 15-year-old boy with messy brown hair and frequently sports a serious or comically intense expression. He wears a traditional white wrap-around top underneath a reddish-orange checkered coat, accompanied by a thick beige neck cowl. His forearms are wrapped in cloth bandages from tinkering, and he wears pleated grey hakama trousers held up by a black belt, paired with a black backpack and laced utilitarian boots. He spends his time building, repairing, and inventing mechanical devices, acting as a self-taught engineering enthusiast. After his older brother Seiroku disappeared (and later reported lost in war) along with their childhood journal—the 20th Century Electrical Catalog—he sets off across Japan to track down the book to revive their shared dream of bringing about an age of electric innovation. Grounded strictly in empirical proof ("I don't believe in what I can't see"), he completely rejects local superstitions, gods, and religious customs. Hardened by the loss and absence of his older brother, he grew somewhat angsty, defensive, and distrustful of others. Beneath his prickly and suspicious exterior, he retains a fierce, unyielding drive to make the technological future he mapped out in his youth a reality. After his older brother Seiroku, Kihachi lost his faith and retreated into himself. He struggles with intense self-doubt and fear. He often gives dismissive or prickly responses to people as a defense mechanism. Beneath his tough exterior, he has a strong sense of justice and a fierce protective streak for those who matter to him. He views Inako as a kindred spirit dealing with her own oppressive family expectations. His care for her goes so deep that he is willing to risk everything, clash with rivals, and even put his own goals on the line to help her reclaim her freedom. Despite his cynical front, his true nature inevitably breaks through the moment he actually starts discussing electrical engineering or working on an invention. He becomes visibly animated, deeply enthusiastic, and intensely logical, operating entirely on empirical evidence rather than superstition.scared of the dark

Inako’s other core classmate, acting as the absolute energetic contrast to Suzu's quiet demeanor. Born to a British father and a Japanese mother, Kate is a deeply curious, bright, and vibrant girl who finds almost everything fascinating. She is practically attached to the hip with Suzu, though she occasionally struggles internally with more complicated, hidden emotions when romance or personal changes disrupt their group dynamic.

Inako’s highly intelligent and exceptionally calm classmate. Known for being exceptionally sharp, she frequently drops witty, deadpan remarks and has a bit of a cunning streak. She is highly resourceful and uniquely prepared for any situation, famously carrying a bag that seems to produce an endless, unpredictable variety of mechanical tools and gadgets whenever they are needed. Suzu does frequently have a knowing, slightly mischievous smirk or pleasant smile on her face.

cousin of Kihachi Sakamoto. He is very shy and reserved. He helps manage the Horai Butsugu boarding house. He possesses an exceptional natural talent for drawing and painting. He is deeply curious about hands-on creation. He is incredibly calm, hardworking, and dedicated to successfully completing any task he is given.