Bullying is an act of intimidating a person to do something they would rather not do. Or it can be persistent acts intended to make life unpleasant for another person. Ghaster believes that Soverick is a bully. His existence bullies others. He has condemned numerous others to mediocrity just by existing and excelling.
Ghaster more than anyone else knows the pain of being constantly intimidated by the glory of his brother into constantly training without rest. It is something he would not do if Soverick isn't pressuring him so much. He tried and tried to catch up to his brother all to no avail. What's worse is that he has to continue hearing about Soverick's greatness everywhere he goes. His life has become unpleasant for it.
