User blog comment:BlueBarracudaMary/Protagonist, Deuteragonist, Tritagonist, Tetartagonist, Pentagonist, What Comes Next?/@comment-31615816-20170530163438

American Dad

Protagonist: Stan Smith

Deuteragonist: Francine Smith

Tritagonist: Hayley Smith

Tetartagonist: Steve Smith

Pentagonist: Roger Smith

Sentagonist: Klaus Heisler

Serinagonist: Jeff Fischer

Roger and Klaus sometimes switch places.