I think Departure is autistic, I know this autistic kid in my school that is obsessed with the end of the world and diseases, there's another one that is obsessed with dinosaurs and knows everything about them, I think they all have their specialities, Departure's is AIDS, the 1st one is always talking about the end of the World and whenever we say 'the World is going to end' he gets really mad and starts beating everything and everybody. Poor Departure