Joferraz is a Brazilian voice actress and radio personality with a career spanning several decades, beginning in the late 1940s. Born in São Paulo, she started her professional journey in amateur theater before moving to television and dubbing. Her early voice work was conducted at prominent São Paulo dubbing studios such as Odil, AIC Fono Brasil, and Cine Castro. During the 1980s, amidst a national dubbing strike, she relocated to Rio de Janeiro, where she worked at the renowned Herbert Richers studio.

In the realm of anime voice acting, Joferraz is notably recognized for her role as the voice of Princesa Neptina, a young mermaid with special powers, in the 1960s anime series "Under Sea Boy Marine," known in Brazil as "Marine Boy". This performance, delivered under the name Joferraz Voxx, remains a memorable part of the series for Brazilian fans. This role placed her among other pioneering voice actresses who dubbed anime for Brazilian television during the 1960s.

Beyond dubbing, Joferraz built an extensive career in voice work for advertising and radio. She was a pioneer for women in the Brazilian voice-over industry, becoming the first woman to provide the voice for a bank commercial and for a newspaper campaign, fields previously dominated by male voices. Her voice became associated with major Brazilian brands, including an early campaign for Guaraná Brahma. She also transitioned to radio, joining the acclaimed team at Rádio Capital. Throughout her more than thirty-year career, Joferraz has contributed her voice to a wide range of media, including television commercials, radio spots, and innovative web portal voice services.