Kitty cat who seems like a rowdy, but is actually calm and collected, he just doesn't stand idly by when others get bullied and picked on, usually looks pretty beaten up because of that, also because people start fights with him or bully him for his slightly demonic look because of his fangs and black sclera or just because he looks like a rowdy and they are dickheads, he actually prefers the comfort of a calm and quiet environment, especially with a good book, usually sounds polite unless he considers you a friend, then he becomes the master of sass and poking fun (especially towards Jackie)
His best friend and crush, he also considers them boyfriends although Jackie is pretty oblivious to that fact. But they spend most of their time together and tease each other and have their little arguments, but also cuddles and hugs and trips to all sorts of places that Jackie wants to go because Shin usually just cares about making him happy.