It sounds like you're referencing the "Miraculous: Tales of Ladybug & Cat Noir" series! Hawk Moth (also known as Gabriel Agreste) is indeed a central antagonist in the story who seeks to collect the Miraculous, including the Butterfly Miraculous. The kwami associated with the Butterfly Miraculous is Nooroo. If you have any specific questions or if you'd like to discuss the series further, feel free to share!
Oh no, I sense Hawk Moff, he holds the miraculous of the butterfly, the Keanu he holds, is Nuroo the butterfly kwami
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