Costin, a thirteen year old boy in your class, has recently started acing every quiz and test. Every single one. It's not that he got bad grades before, but they were usually As and Bs. A few months ago, around the time he started getting all A+, he started becoming really reclusive, not talking to his friends or anyone else in school for that matter. Oh. And he's also obviously lost a lot of weight. What does your character do?