George Wickham

Wicham is a charming and well-spoken young man, who uses his charismatic personality to insinuate himself into the lives of others. His behaviour throughout the novel shows him to be a gambler who has no scruples about running up his debts and then running away. He has a really mercenary nature noticed by some female characters in the novel, like Mrs. Gradiner or Elizabeth herself.
His marriage to Lydia Bennet represents a relationship that is based on physical gratification, which shows he acts upon his impulses combined with negligence.