Based off the Perman x Ninja Hattori-Kun hybrid character from a Doraemon (1979) episode.

https://x.com/SQUIRM_Pynchon/status/1901594533227597886

You can find this on Deviantart:

https://www.deviantart.com/mariomaniacyt/art/Ninja-Perman-kun-1209861852