Sensei

Sensei is a master of martial combat, modern weaponry, and tactical thinking. He is decidedly not Japanese.

Sensei presumably trained Ingall Jack before or during his continued residence at Atlas Cryogenics. They became close enough for Sensei to refer to him as his son.

He later awakened Spinn and bestowed him his spinner, before being murdered by Recorder Man.

Early History
Long before the events of Fidget Spinner Boy: Road Chip, Sensei presumably practiced fighting and combat. Somehow, he obtained his fidget spinner, for the use of fighting against the darkness. It also implied that Sensei met Recorder Man during this time.

He later met Fidge Spinn and took to training him. Eventually, they became close enough such that Sensei referred to Spinn as his son.

Death
On July 15th, 2017, Sensei visited the cryogenic chamber where Fidge Spinn resided. There, he gave Spinn the spinner that he once wielded himself. This spinner eventually became Spinn's namesake.

Upon leaving his chamber, Sensei was murdered by Recorder Man, leaving his pupil distraught and vengeant.

Legacy
Sensei was the catalyst that inspired Fidget Spinner Boy's quest for vengeance, beginning the events of ''Fidget Spinner Boy: Road Chip. ''

His legacy continued in the form of Fidget Spinner Boy's Perfect Spinner, modified from the spinner that Sensei bestowed upon him.