Karen Ramalho is a Brazilian actress and voice actor known for her extensive work in dubbing, particularly in anime, animated series, and films for the Brazilian Portuguese market. Her career encompasses a wide range of characters, from leading roles to supporting parts, showcasing her versatility across different genres and media.

Ramalho has lent her voice to numerous prominent anime series. She is notably the voice of Dr. Kureha in the UniDub version of the long-running series One Piece, a role she also reprised for the film One Piece: Episode of Chopper - The Miracle Winter Cherry Blossom. Her other significant anime credits include Maria in Baki Hanma, Pegatrix in Bakugan Battle Planet, and Tier Harribel in both the original Bleach series and its sequel, Bleach: Thousand Year Blood War. She has also voiced characters in other major franchises such as Dragon Ball Super as the fighter Monna, Godzilla Singular Point as Tilda Miller, and in series like B: The Beginning, Cannon Busters, and the US-produced Castlevania.

Beyond anime, Ramalho's voice is featured in a variety of western animation and live-action projects. In animation, her work includes the character Garra Longa in the Sonic the Hedgehog live-action films and General Atitaya in Raya and the Last Dragon. Her live-action dubbing credits are equally diverse, encompassing series such as 13 Reasons Why as Olivia Baker and Anne with an E as Mary Hanford-Lacroix, as well as films like the Scream franchise. In the realm of video games, she is known for voicing Sindel in Mortal Kombat 11 and Skadi in Smite.

Ramalho's work demonstrates recurring collaborations with specific dubbing studios, such as UniDub, where she has also taken on the role of dubbing director for the film A Vida Pode Mudar. Her extensive and varied body of work has made her a familiar voice to Brazilian audiences, establishing her as a notable figure in the country's dubbing industry.