Since he was born, Thomas has been a werecat.  At random times in the day, he involuntarily will grow paws, a tail, or ears or even turn into a black cat. He tends to transform most when he is bashful or nervous. He hates his curse. His cat form usually lasts a few hours, acting like a cuddly pet cat. He transforms back at random times too, usually after an hour. His transformation usually lasts a while and causes him pain. Even in human form, he purrs and does some catlike behaviors.