Hayden Daviau is an American voice actor born on April 25, 1996, recognized for their extensive work in English dubs of anime and video games. They have built a career portraying a wide variety of characters, ranging from shy and gentle figures to those with more eccentric and energetic personalities.

Daviau's body of work includes several prominent roles in anime series. They are well-known for voicing the Priestess in the dark fantasy series Goblin Slayer, a role they reprised for the film Goblin Slayer: Goblin's Crown. In the music-themed series Given, they provided the voice for Yayoi Uenoyama. Daviau also voiced Rina Tennoji, a member of the school idol group in Love Live! Nijigasaki High School Idol Club. Their other notable anime credits include Matsuri Shiina in Miss Caretaker of Sunohara-sou, Kōenji in The Helpful Fox Senko-san, Tomoyo in Henkei Shoujo, Batard in Ulysses: Jeanne d'Arc and the Alchemist Knight, Rin Vispose in Our Last Crusade or the Rise of a New World, and Benkei Musashibo in Ikki Tousen: Extravaganza Epoch.

Beyond anime, Daviau has lent their voice to a wide range of characters in video games. Their performances include the multiple roles of Tribbie, Trianne, Trinnon, and Tribios in the popular game Honkai: Star Rail. They also voiced the character Marnie in Pokémon: Ultimate Journeys, Eri in Pokémon Masters EX, Vikala in Granblue Fantasy Versus: Rising, and Kokorone Awayuki in VTuber Legend: How I Went Viral after Forgetting to Turn Off My Stream. Earlier in their career, they voiced the characters Enterprise and Eldridge in the game Azur Lane.

In addition to their work in scripted media, Daviau is involved in the improvisational tabletop role-playing community. They are a regular cast member on the channel Nat19, featuring in several of its ongoing series, and also host the Nat19 podcast Wits & Crits.