Toil and Trouble are a pair of Siamese cats, that just so happen to be twins.  These "Siamese twins" are a mischievous pair.  The two have the ability to shape shift, but so far their abilities only allow them to change color and pattern, allowing them to imitate different breeds of cats.  They are both friends of Vlad, but their competitive nature often pits them against each other while vying for his attention.