While looking up the causes of bullying I came across this webpage that explain why people do get bullied, I have found this page very helpful when creating my protagonist and events that could happen within my game
Gordon, Sherri . (n/a). 10 Reasons Why Kids Are Bullied. Available: http://bullying.about.com/od/Victims/a/10-Reasons-Why-Kids-Are-Bullied.htm. Last accessed 14/03/2014.