Bessie

Bessie is a cow that appeared in SMG4: Mario Goes to the Fridge to Get a Glass Of Milk.

Luigi tries to milk her, but it takes all day, and Luigi still doesn't have a bucket full. She later saves Luigi form Jeeves by transforming into "Demon Cow", starting a cow uprising against the Milk Guards, and kicking Jeeves away. She is last seen waving goodbye to Luigi and watching him and his friends drive off.