Maria Luiza Grantaine, also known professionally as Moo-chan, is a Brazilian voice actor, presenter, and cultural professional with a career deeply connected to Japanese pop culture. Her formal training includes studying theater at the Teatro Escola Macunaíma in 2014 and communication at FAPCOM, where she focused on radio, TV, and internet. Her professional journey is marked by a versatility that spans dubbing, presenting, and content creation.

In the field of dubbing, Grantaine has lent her voice to a variety of characters in anime and live-action productions. She is notably the Brazilian Portuguese voice of Ayako Yamada in the anime series Kageki Shojo!!. Another prominent anime role is P.A in the popular series Bocchi the Rock!. Her work also includes the character Eve Callusleader in Minha Habilidade Única Me Deixa Invencível no Nível 1. In addition to these named roles, she has contributed with additional voices for other anime such as Meu Trabalho no Café Yuri!. Beyond anime, her dubbing credits extend to major franchises, including providing the voice of Boa Sandersonia in One Piece, Gina Weasley in the Harry Potter film series, and Ha-ni in the live-action series Sweet Home.

Beyond the recording studio, Maria Luiza Grantaine is recognized for her work as a presenter and content creator focused on East Asian pop culture. She was a presenter and screenwriter for the program Bunka Pop on PlayTV and for the Bentô channel on Omelete Co.. Her expertise in the field led to her role as a presenter, curator, and consultant on cosplay, anime, and manga for CCXP, one of Brazil's largest pop culture events. She has also been a presenter and screenwriter for Splash UOL. Her multifaceted career and deep engagement with Japanese culture were the focus of an episode of the HAJIMARU podcast, produced by the Fundação Japão em São Paulo.