Mariana Dondi is a Brazilian actress and voice actor born in Rio de Janeiro on May 31, 2005. She began her career in dubbing at the age of ten and is the daughter of Marcio Dondi, also an established actor and voice actor in the Brazilian market. Her early work included voicing characters in various films, series, and cartoons.

Dondi has gained recognition for her work in anime, particularly for lead and supporting roles in series distributed by Crunchyroll. She voices the character Alice Stardia in the anime The Hidden Dungeon Only I Can Enter. The Brazilian Portuguese dubbing for this series was produced by the studio Som de Vera Cruz in Rio de Janeiro as part of Crunchyroll's Express Dubbing program. Her most prominent role to date is the lead character Hayase Nagatoro in the popular anime Don't Toy with Me, Miss Nagatoro, marking her first time voicing a main protagonist in an anime series. She reprised this role for the series' second season, Nagatoro 2nd Attack.

Beyond these anime roles, Dondi has built a diverse portfolio in dubbing for live-action productions. Her work includes frequently voicing the actress Ariana Greenblatt in films such as Barbie, Avengers: Infinity War, and In the Heights. She has also provided the Brazilian voice for characters in major productions like the series Euphoria and the video game adaptation The Last of Us.