ななこ

A cat-like creature (female) who had fallen in front of the protagonist's home.
When protagonist gives food to her, she longs for the protagonist as "Goshijin-sama" and gives her a smartphone with transformation ability to thank him for saving her.

He speaks with the ending "-nau", so the protagonist named it "Nanako".
She also seems to like to mess with her PC against her appearance.

"Goshijin Sama now has the ability to transform into anything, nau!"