Naomi Maruyama is a Japanese voice actor from Aomori Prefecture, born on March 1, who is affiliated with the talent agency LAL. She began her career after training at Studio Cambria and was previously represented by ACT.OZ. Her professional skills include skiing and speaking the Tsugaru dialect, and she has a noted interest in donating blood and watching horror films.

Maruyama's career is primarily built on supporting roles in numerous anime television series. Her filmography, spanning from the late 2000s into the mid-2020s, demonstrates a consistent presence in the industry. She has appeared in popular long-running franchises, providing voices for various characters in series such as My Hero Academia, Attack on Titan, Shinkalion, and Pokémon Horizons. Other credits include roles in Delicious in Dungeon, Pluto, MF Ghost, The God of High School, and a recurring part in the 2017 series Anime-Gataris. In addition to television work, she has contributed voice work to original video animations and video games.

One of her notable early roles was in the 2014 net animation Gakumon! ~Ōkami Shōjo wa Kujikenai~, where she voiced the character Timid. Maruyama has also taken on significant roles in major franchise projects. She was cast as the celestial being Hord in the Monster Strike anime series after winning the TenSei Voice Actor Audition at the XFLAG PARK 2019 event. Her work also extends to internationally distributed projects like the 2023 Netflix anime Pluto, where she voiced a guide character.