Ranko Baba is a Japanese voice actress affiliated with the talent agency Production Ace. She was born on June 1 and hails from Osaka Prefecture. Her qualifications include a regular driver's license and a TOEIC score of 695. She possesses a range of skills, including playing the piano, drums, and marimba, as well as ice skating. Her hobbies include making sweets and house hunting, and she is also a speaker of the Kansai dialect.

Her career encompasses a variety of voice work, with a significant focus on dubbing for foreign films and television series. In the realm of dubbing, she has contributed to numerous projects. Her Japanese dubbing credits include roles in the final season of NCIS: New Orleans, season twenty-one of Law & Order, season four of Magnum P.I., the series Romanero, season three of Our Blue Summer, season two of Loki, season six of Black Mirror, the film Ripley, and the series On Call. Her film dubbing work features roles in Saw X as Valentina, Revengers: The Life Snatcher as Reina, Mother/Android as a Korean employee, Yakuza Princess as Samara, Mothers as Nana and Elena's mother, Crazy Phoenix as Phoenix, MAKO: The Deadly Ship as Galam, Dangerous Buddies as the front desk clerk, Five Nights at Freddy's as Cindy, Bad Treasure as Susan Forrester, The Spy: Agent Ultra as Dingding, Wing Girls as Bear, Winter Spring Summer or Fall as Ashley, Stephen King's The Stand as Sheila, The Creator, The Exorcist III, Sympathy for the Devil as a wife, The Judgment as Wallace, Red Riding Hood Wolf Hunter as Berta, Night Swim, The Best of Enemies, American Underdog, Insidious: The Red Door, and Three Kingdoms: God of War, Zhao Yun.

In animation, Baba voiced a role in a 2024 dubbing project. She is also the voice of Jela in the video game The Elder Scrolls Online: Blackwood. Additionally, she has worked as a narrator for web commercials, including those for the hometown tax donation app Furusato Nozei App Fururu. Her work extends to audiobook narration, where she has voiced titles such as the Agents of the Four Seasons series, Every Day is Like a Storm, But Somehow We Get By, and Heavenly Demons.

Baba has also begun to establish herself in television anime. Her most notable and widely confirmed role is Ayame Hazakura, the Guard of Summer, in the anime series Agents of the Four Seasons: Dance of Spring, which began broadcasting in 2026. She is part of an ensemble main cast for this production, which also features voice actors such as Yuka Nukui, Yoshino Aoyama, Sumire Uesaka, Hime Sawada, Taku Yashiro, Shogo Sakata, and Satoshi Hino. Her performance as Ayame Hazakura represents a significant early credit in Japanese anime series.