The backgrounds and prototypes of heroes in "Brawl Stars" are diverse. The following are the backgrounds and prototypes of some heroes:

1. Shelly: Shelly's prototype is a classic The western cowboy, her name and image were inspired by American western movies. Shirley is a brave, decisive woman who is adept at fighting with a revolver.

2. Rosa: The prototype of Rosa is the famous American civil rights activist Rosa Parks. Rosa is a strong warrior in the game, and her story is inspired by real-life deeds of bravery.

3. Beck: Beck is based on a rock singer. His appearance and musical theme skills are related to rock culture.

4. Pam: Pam is based on a nurse. She uses medical props to treat her teammates in the game. She has a lovely image and a passionate personality.

5. Cole: Cole is based on the Swedish environmental girl Greta Thunberg. She serves as a tax collector in the game and has the line "How dare you!".

6. Nita: The prototype of Nita is a brave hunter who fights against evil forces with her bear partner ***. Nita's backstory involves an ancient and mysterious forest, and her bear may have been her childhood companion.

7. Lion: The prototype of Lion is the African lion. He is a powerful leader and has the ability to summon reinforcements.

8. Elfi (El Primo): Elfi is based on a matador. He is good at attacking with a sword, and his image and skills are full of Spanish style.

9. Pepe: Pepe is based on a Mexican wrestler. He has powerful melee capabilities and a unique shape.

10. Sarah: Sarah is based on a female police officer. She is good at shooting with a submachine gun and has a capable and brave image.

The above are only the backgrounds and prototypes of some heroes. The backgrounds and prototypes of other heroes are equally rich and diverse, reflecting the creativity and intention of the game developers. Players can experience characters from different cultures and professions in the game, which increases the fun and richness of the game.