Princess Poppy is the main protagonist of the 2016 film Trolls
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She is the love interest of Branch. You can see that Branch is secretly in love with Poppy, as for he shows hints throughout the movie. During the song "True Colors", Branch sings to Poppy "..and that's why I love you."
When Poppy becomes the queen of the Trolls, the two become a couple. She is voiced by Anna Kendrick.