Gaia Wise is an English actress who made her debut as an anime voice actor by taking on the lead role of Héra in the 2024 animated film The Lord of the Rings: The War of the Rohirrim. This marked her first experience performing voice work for an animated project, a process she has described as initially daunting due to recording without visuals or other actors to interact with, but ultimately creatively liberating. For her performance, Wise worked closely with the film's director Kenji Kamiyama and producer Philippa Boyens over a period of several years to develop the character, who is an original creation not fully named or detailed in J.R.R. Tolkien's original writings.

Beyond voice acting, Gaia Wise has pursued a career in on-screen and stage acting. Her early film credits include roles in Last Chance Harvey (2008) and A Walk in the Woods (2015). On television, she has appeared in episodes of Silent Witness in 2022 and The Chelsea Detective in 2023. In 2025, she appeared in the thriller Dead of Winter and joined the cast of the television series All Creatures Great and Small for its sixth season. She also made her theatre debut in a 2015 production of Sweeney Todd at the English National Opera. At this time, the role of Héra in The Lord of the Rings: The War of the Rohirrim represents her sole major voice acting credit, and further notable achievements or recurring collaborations in the animation field have not been established.