Stan Smith: He is drastic, reckless, insensitive, competitive, racist, and very masculine. In the series he is emphasized as a conservative Republican and the husband to Fancine and the father to Hayley and Steve

Francine Smith: She is the kind of housewife who can't stand downtime – the boredom can be unbearable. In order to keep herself occupied, she prefers to cook and clean relentlessly she is the wife to Stan and the mother to Hayley and Steve

Hayley Smith: She is passionate, liberal, and intuitive and she hates her brother Steve and torments him and she is the daughter of Stan and Francine and sister to Steve

Steve Smith: He is enthusiastic, ambitious, and wimpy nerd and he also hates his sister Hayley but sometimes he cares but likes tormenting her

Roger Smith: He is a alien with a big head and he is is sarcastic, irritable, argumentative, disrespectful, impolite, obnoxious, destructive, childish, petty and cruel and he is adopted by Stan and Francine and became Steve’s best friend

Klaus: He is a fish and he can talk and he is manipulative, lonely, and aware of Roger's abusive nature, wise, wistful, and sadistic and he also wants to expose Roger for his true self