User blog comment:BlueBarracudaMary/Protagonist, Deuteragonist, Tritagonist, Tetartagonist, Pentagonist, What Comes Next?/@comment-33286367-20200124014244/@comment-33286367-20200128021524

And if there was a third movie for The Secret Life of Pets:

Protagonist - Gidget

Deuteragonists - Max, The new heroic character

Tritagonists - Snowball, Daisy

Tetartagonists - Chloe, Liam, The second new heroic charcter

Pentagonist - Tiberius, Rooster

Hexagonist - Buddy, Hu

Heptagonist - Mel

Octagonist - Katie

Nonagonist - Chuck

Decagonist - Norman, Sweet Pea

Endecagonist - Duke

Antagonists - The new evil character, the second new evil character, the third new evil character, the fourth new evil character, all new evil characters