This is Rum.
Note the greenish blob on the floor in front of her. This is an old sock filled with nepeta, commonly known as catnip. This herb makes Rum behave in very un-Rum behavior, such as exhibit mirth, joy, and playfulness.
Run has earned the nickname "Crabby Patty", and through a careful program of desensitization, she now receives kisses to the top of her head without vocal protestation. She has her limits, but this is considered progress within the context of the Rum/human relationship.