Risa Sudou is a Japanese actress born on July 24, 1976, in Kanagawa Prefecture, Japan. While the user query specifies the role of an anime voice actor, the available information identifies Sudou as a live-action television and film actress rather than a voice actor for animated works. Her career in the entertainment industry began after she was selected from 1,815 applicants for the lead role in the 1998 NHK morning serial television novel Ten urara.

One of her early notable roles came in 1999 when she portrayed Misaki Nishijima in the television series Rasen. The series, which aired on Fuji TV, is a sequel to the horror film Ringu and is part of the Ring franchise. In the show, her character appeared in six episodes. Several years later, in 2005, she played the role of Yuko Mizuki in the television drama Densha Otko (Train Man). This series, based on a popular internet forum story that was later adapted into a novel, manga, and film, featured her as part of its main cast in a recurring role across multiple episodes.

Beyond these two titles mentioned in the request, Sudou's larger body of work includes a wide range of guest roles and supporting parts in numerous Japanese dramas. Her extensive television credits include appearances in the long-running medical drama series Kyumei Byoto 24 Ji (Emergency Room 24 Hours) as Yuki Sakurai, and in Yasashii Jikan, Top Caster, Saitou san, and the popular anthology series Midnight Diner. In the 2010s and 2020s, she has continued to work steadily, taking on roles in productions such as the drama series Suits, The Good Wife, and Alice in Borderland, as well as the film Makuko. Her filmography also includes appearances in the 2016 film Midnight Diner 2 and the 2019 feature Tokyo Wine Party People. Information regarding specific awards or formal vocal training is not detailed in the available search results, but her consistent work across a wide period demonstrates a stable career in Japanese television and cinema.