As it turns out Fuller isn't actually all that shy. He keeps trying to get Izzie to play with him and cuddle with him, and Izzie is stubbornly showing her inner-siamese and being prissy about it. She's no longer hissing at him or growling at him, and she's even agreed once or twice to play adjacently to him, but she hasn't agreed to a real friendship with him yet. It feels very much like a feline interpretation of "Taming of the Shrew," where Izzie is the shrew.