Kasumi Goto is voiced by Kym Hoy. Hoy noted that Kasumi's cultural background is specifically stated to be of Japanese descent, and that the casting call required a candidate who could carry the mystique of an elusive personality along with projecting a vaguely Asian-sounding accent. With the guidance of her voiceover directors, Hoy made necessary preparations to develop a blend of Japanese and British English accents for Kasumi's soft-spoken voice; as she wanted a little mystery surrounding where Kasumi is truly from, she was mindful about not making the accent overly modern-sounding and not too precise. Hoy credits her past experience in performing ethnic Asian characters as well as her classical theatre and singing training for her ability to perform Kasumi's accent at a consistent pace, and ensuring the character sounds natural in terms of timing and delivery without it becoming a caricature. Hoy noted that while BioWare had specifications about how they wanted the character to sound like, with "1940s movie star sass" being an ideal, they were also open to feedback and questions from her about the development of the character's personality.
