robba3
Robba-san (or Mr. Robber) is an original character created by [[Wangphing]] in a oneshot doujin (pool #11085) featuring Kashima being robbed by the former in her tenure as a Lawson shopkeeper. 

He is designed with a facial scar, possibly a burn scar that he hides with his hockey mask.
robba-san (wangphing)