Brawlers are a creation of the Brawl Stars Team from SUPERCELL, under the Fernanda Oliveira's guidance.
Ocellus provides the in-game Portrait integrated in the User Interface.
SUPERCELL:
Art direction Supercell : Fernanda Oliveira
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OCELLUS :
Lead Character Design : Robin ‘nonamenosocks’ Herrmann
Art direction, color and clean : Romain "Sephy" Pergod
Additional Concept art : Renato Siragusa

https://www.artstation.com/renatosiragusa
https://www.artstation.com/nonamenosocks
https://www.artstation.com/artofsephy