Irma

Irma: 

1) Waitress and owner of "Irma's Diner," a diner occasionally patronized by Jon and Garfield. 

2) The food, service, and mental stability of her restaurant is questionable. 

3) For instance, her idea of a "chicken surprise" is her coming up to the table wearing a rubber chicken mask and saying "SURPRISE!" 

4) However, this may be attributed to her operating the diner 24 hours a day with no help (though in other comics, she is shown to speak to other diner employees). 

5) Although her main and most memorable appearences took place earlier in the strip, in 1999 she appeared (updated to match the most recent style of the strip), once again doing wacky things at the diner.