Michi

Michi (みち) is Sumika's younger sister who passed away from an illness and got taken control by a Nokker.

Background
Michi originally suffered from an illness and eventually passed away, however, a Nokker took control of her body and replaced her.

To introduce Nokkers to the world, she appeared in videos as Nono, showing off her powers. Many thought it was fake, so she revealed her true identity to the world.