Larissa Gallagher is an Australian voice actor based in Los Angeles who has built a diverse career spanning anime, animation, and video games. Born and raised in Perth, Western Australia, she graduated with a Bachelor of Arts in Musical Theatre from the West Australian Academy of Performing Arts in 1997, a background that underpins her vocal work. Before relocating to the United States, she worked extensively in Australia as a voice-over artist for commercials and as a voice-over coach.

In the realm of anime, Gallagher has taken on a range of roles in English-language dubs. She voiced the role of Shimamura's Mom in the Funimation-produced English dub of the series Adachi and Shimamura. She also provided the voice for Fine, the Queen of the Vampires, in the 2022 Netflix original animated series Vampire in the Garden. Her work in anime also includes a role in the Mobile Suit Gundam franchise, where she voiced Barbara in the 2022 film Mobile Suit Gundam: Cucuruz Doan's Island. Gallagher's other anime credits include Sachiko in a modern dub of the classic film Tokyo Godfathers, the Voice of U in the acclaimed film Belle, Mato's Mother in Black Rock Shooter, Haruna Ogawa in Maesetsu!, a Prison Guard in JoJo's Bizarre Adventure: Stone Ocean, and Lola Michisato in Komi Can't Communicate.

Beyond anime, Gallagher is well-recognized for her voice work in Western animation. She is perhaps best known for voicing the character Lagoona Blue in various installments of the Monster High franchise, including the films Welcome to Monster High and Monster High: Great Scarrier Reef. She also voiced Bluebird Azurite in the series Steven Universe Future and the Koala Princess in OK K.O.! Let's Be Heroes. Her voice can also be heard in the animated series WondLa.

Gallagher has an extensive portfolio in the video game industry, with credits on over forty titles. Some of her notable game roles include Female Avatar Fighter 6, Sonia in Fire Emblem Heroes, Anita's Mother in Silent Hill: The Short Message, Delphine in The Walking Dead: Saints & Sinners, and Friday in Agents of Mayhem. She also voiced the character Julia in the acclaimed independent game Firewatch. Her work extends to providing additional voices for major blockbuster titles such as Red Dead Redemption 2, Final Fantasy XVI, The Last of Us Part II, and Days Gone.