Vankin is a character introduced in Cut the Rope: Experiments. (According to the Cut the Rope: The Comic, at least.) He becomes Om Nom's owner after finding his box and proceeds to do experiments with Om Nom
"Let's make some experiments"
"I'm sure you can do it!"
"My invention is almost complete."
"Oh, the Nobel Prize is waiting."
"Boy, that was a good one."
"Let's try again"