Age: 21

Crimes: smoking, setting public bins in fire, stealing a car and setting it on fire

Oh Sehun is a pyromaniac. He grew up with a silver spoon in his mouth - the son of a wealthy businessman - and was expected to take over this business when he came of age. However, all of the rules and restrictions put on him made him rebel, so he took up smoking which is where his fascination with fire started. From there, he experimented with lighting small fires in his backyard, before moving on to lighting public bins on fire. He went so far as to steal a car and set it alight just to watch it burn, and was caught by the police and sent to the academy.