Gale

Gale, the Bad Princess is a female bird in Angry Birds Stella and is the primary foe in said title, replacing the King Pig from the standard Angry Birds titles.

Gale is Stella's former best friend until one day they fell out diffrent ways. She earned the nickname "Bad Princess" when she put on the crown in order to control the Bad Piggies. She is obsessed with the golden egg and spends most of her and the pigs' time to find it. Part of her wants to reunite with her friends but she is blinded by pride, vanity, power, and greed. Multiple things make her angry and she is dangerously cunning.

Trivia

 * Gale is currently the first and only villain in the main series that is a Bird.