Beatriz Llaneza Mielgo is a Spanish voice actress known for her work in animation, television series, and video games. She is notably recognized as the Spanish voice of the protagonist Suzume Iwato in the 2022 Japanese animated film Suzume, directed by Makoto Shinkai.

Born in Veguellina de Órbigo, Spain, Llaneza Mielgo developed an interest in dubbing from a young age. She and her twin sister, Verónica Llaneza Mielgo, who is also a voice actress, pursued formal training at the Escuela de Doblaje de Madrid under the direction of veteran voice actor Lorenzo Beteta. Her professional voice type is characterized as adolescent.

Beyond her role in Suzume, Llaneza Mielgo has built a diverse career spanning multiple media. In television animation and live-action dubbing, her credits include voicing Skylar Gilstrap in NOLA Darling, Marsha in Euphoria, Wednesday Addams in the series Wednesday, Ciri in The Witcher, Ellie in You, and Asiye in Hermanos. In the realm of video games, she has provided voices for notable characters such as Angrboda in God of War: Ragnarök and Neeko in League of Legends. Her additional dubbing work includes characters named Chloe and Zoe in the series Piny: Institute Of New York.

In addition to her performing career, Llaneza Mielgo is also an author. She published her first novel, Si tiene que ser…, under the pseudonym Josephine Wind.