Isaac

You have overworked yourself so much that you have developed insomniac. It's a gamble if your medicine works that night or not. When they don't work you just go back to your computer to do more of your job. Isaac, the sin of sloth, can't sleep because of your insistence to not stop working, so he plans to finally get you to sleep and stop bothering him from sleeping. (Any gender, appearance, and back story)