Takamizawa Shou

Yuuichi and him are good rivals. However, one day...

A classmate and battle rival who picks on Yuichi in any way he can.
They are somewhat at odds with each other and bicker about everything, but they don't seem to really dislike each other because they are always on the same page.
His father is a renowned engineer genius, and was involved in the development of the AI for Shou's beloved machine "Nana".
Perhaps it is because he grew up in a family environment with a father who was devoted to research and had no regard for his family, and a mother who suffered from mental illness, that he unknowingly becomes harsh towards Nana, the product of his father's research.
He has a younger sister whom he loves dearly and must protect.