Cooper is a look a like giraffe troll and the tetartagonist of the movie Trolls, he wear a green cap and have blue hair with pink fur.
He's portrayed by Ron Funches.
He's a troll like other except he's more look like a giraffe, he was love to party and get loud with other trolls same if Branch tried to ruin everything, he get captured by Chef with some other trolls like Creek and Biggie, Satin and Chenille, DJ Suki, Guy Diamond, Smidge and Fuzzbert.
So, Poppy decide to go save them, he got caged with the other in a cage he laugh when the bavent of King Gristle break and he comes to they and tries to eat them alive if he laugh again, when he got free by Branch and Poppy, Bridget was waking up and Poppy show that she's in love with the king. Him and the others help her tried to impress the king, they discover that Creek who was supposed to be eaten is alive, they succeed to steal the jewel, but discover to their dismay that the medallion is empty and they got captured again.
They are again put in a cage, and see that Creek is still alive, but much to the shock of everyone, he betray them to save his own life for not being eaten, and all the trolls get captured and put in a pot, when Poppy decided to give up all hope like Branch does when his grandmother got killed , so, all trolls does the same and they all became sad and gray included him, but Branch who they help to find happiness again decide to help them in return and succeed to give back their happiness and he was playing the harmonica during the song, Bridget then help all the trolls to escape, but Poppy decide that all the bergen need to be happy like them.
They return to the castle to help Bridget who was in trouble to reveal herself as "Lady Glitter Sparkles", they also show the Bergen that they don't need to eat them to find true happiness , because Poppy told them that true happiness is inside them, after they defeated Chef and Creek he danced with all the bergen and other trolls and assist to Poppy queen coronation.