Random Smoker

Random Smoker is an unnamed character who can be seen in the background of several episodes. She was first seen in the pilot episode while Herbert was running around the backyard from Grubby. A popular theory exists that Random Smoker is actually the ghost of the previous owner of Herbert's house, and that she still haunts the place. The ghost may be the one to do the housework, since it's doubtful that either Herbert or Grubby would do it. Some of the objects in the home, like a tea trolley and a gumball machine, seem very old lady-ish, not something that would likely belong to Grubby or Herbert, as if Random Smoker's things stayed in the house when ever Herbert moved in.

Spooktastic.