Olga Hnidey is a Mexican voice actress, director, and teacher with a career spanning several decades in Latin American dubbing. She has been active in the industry since at least 1985 when she was recognized as best actress at the Festival Chamizal National Memorial. Her birth year is recorded as 1962.

In anime, Hnidey is known for playing Fuzuki Kouyama, the grandmother of the protagonist Mitsuki, in the Spanish dub of the series Looking for the Full Moon, also known as Full Moon o Sagashite. Her other significant anime roles include Blackarachnia, also referred to as Araña Negra, in Beast Wars and Beast Machines. She provided voices for multiple characters in Ranma ½, including an elderly woman traveling with Ryoga, and played Varie Fanel as well as Hitomi's mother and grandmother in The Vision of Escaflowne. Her work in the Pokémon franchise includes the characters Laurie, Abigail, and Madame Catherine across different series. Additional anime credits include Abuela Ohana Baasan in Kemono Jihen, Megu Tsuyumine in Eyeshield 21, the alert voice in Neon Genesis Evangelion, Aunt Polly in a redub of The Adventures of Tom Sawyer, and a society woman in Remi.

Beyond anime, Hnidey has an extensive filmography in animated series. She voiced Ma Vreedle in Ben 10: Alien Force and Ben 10: Omniverse, Maude Flanders and additional voices in The Simpsons for seasons seven through nine, and Queen Slurm in Futurama. She has also performed as Gertie's Grandma in Hey Arnold!, Dexter's mother in an episode of Dexter's Laboratory, Professor Poofenplotz in Phineas and Ferb, and Evelyn "Cookie" Brown in Cleveland. In children's programming, she provided the Latin American Spanish voice for Annie the railway carriage in Thomas & Friends and voiced Jojo Williams in Craig of the Creek.

In the field of video games, Hnidey has contributed to several major titles. Her voice work can be heard in Call of Duty: Black Ops 6, Diablo IV, Redfall, New World, and LEGO DC Super-Villains as part of the Latin American Spanish voice cast.