You see, Girls? - Even such stories as Trolls confirm the fact that Men are Visualizers - so when Bridget was a shy Maid & looked like that: 

King Gristle didn't pay any attention to her.

- But when she put nice clothes on, had a better Hairstyle & behaved like a self confident person - He asked her for a date - & instantly Fell in Love with Her! 😁💕 ( she already Loved HIM - so she was Happy about it - & they spent some nice time together, discovering that 'You don't have to eat Trolls to be Happy' btw )

Those who watched Disney animated 'Cinderella' obviously know why I compared Bridget to her :)  ( - & maybe they thought the same while watching 'Trolls' )

Bridget is like Cinderella because: 

- both of them were treated like maids & had to work hard before

- both were turned into Beauties with some help & went to meet their Prince Charming

- both spent a wonderful time with Their Prince Charming ( one with a Human - the other with a Bergen ) & made him Fall in love with them for the First Sight

- both had to go out suddenly & run away from a Ball or a Date

- both lost something while running ( a shoe & a roller skate ) 

- both were found By Their True Love thanks to the 'trace they left' & were Happy at the End

- & both were Very Positive Characters! :)