Aerin is the disgruntled cousin of cassian and son of harvox, he is best described as a snobbish, uptight bully who constantly mocks and ridicules everyone who talks to him excluding his father who he secretly craves approval from. despite his annoying exterior aerin deep down is simply a troubled and misunderstood young man who feels hes failing to live up to his fathers expectations.(think of this character like joffrey baratheon albeit not as sadistic but from his personality standpoint)