Luísa Viotti is a Brazilian voice actor known for her extensive work in dubbing anime and animated series into Portuguese. Her career encompasses a wide range of prominent roles in popular anime franchises, as well as voice work in live-action series and films. Viotti has also taken on ADR direction for anime series, demonstrating her versatility within the dubbing industry.

Among her most recognized roles is Kirari Momobaki, the student council president, in the anime series Kakegurui. In the first season, she also voiced Kirari's twin sister, Ririka. She is the voice behind the witch Echidna in Re:ZERO -Starting Life in Another World- across its second and third seasons, as well as in the OAV The Frozen Bond. Viotti also voices Makima in the Portuguese dub of Chainsaw Man and Mina Ashiro in Kaiju No. 8.

Her other significant anime credits include Parona in To Your Eternity, Amane in The Hidden Dungeon Only I Can Enter, Aschella in Drifting Dragons, Marie in Great Pretender, Gelda in The Seven Deadly Sins: Cursed By Light and Dragon's Judgement, and Happy in a redub of Fairy Tail and its film Dragon Cry. She has also provided voices for anime films, such as Makoto in Bubble, Shiro in Child of Kamiari Month, and Rebecca Chambers in the animated films Resident Evil: Vendetta and Resident Evil: Death Island. Additional roles include Kahono in Black Clover, Liza in Death March to The Parallel World Rhapsody, and Sarah Kazuno in Love Live! Sunshine!! The School Idol Movie Over the Rainbow.

Beyond anime, Viotti's dubbing work extends to other genres. She has voiced Zoé Lee in Miraculous: As Aventuras de Ladybug, Josie McCoy in Riverdale, Cinderela in WiFi Ralph, and characters in productions like The Loud House and Toy Story 4. In addition to her performance work, Viotti has served as an ADR director for the Portuguese versions of series such as Heavenly Delusion and Tokyo Revengers: Christmas Showdown.