Chiko Mizumori is a Japanese voice actress from Saitama Prefecture. Her real name and former stage name is Chikako Sugimura. She is currently affiliated with the agency Black Ship, having transferred there on July 1, 2024, at which time she also changed her stage name from Chikako Sugimura to Chiko Mizumori. She was previously affiliated with Doujinsha, which is now known as al-share, and later with Stay Luck, where she was a member from 2018 until March 31, 2024. In 2016, she joined the Stay Luck affiliated voice acting training school Follow-Up. Her career in voice acting began in the 2010s; one of her earliest known roles was as the young Seya in the 2014 OVA series Hybrid Child. In 2014, she also became a member of the voice acting group Nigodoru on the streaming service SHOWROOM, taking on the role of Mashiro Yukino, which she played until 2016.

As a voice actress, Chiko Mizumori has portrayed a wide range of characters, most frequently in supporting and guest roles across numerous anime television series. According to the provided example, she voiced the Commercial Audio in the series My Daemon. Her other notable anime roles include Queen in Delicious in Dungeon, Stephanie Carlisle in Why Raeliana Ended Up at the Duke's Mansion, a Saimori family servant in My Happy Marriage, Dorothy in Buddy Daddies, and Inko Tachibana in Go Go Loser Ranger. She also played the role of Emiko Miyazono in the film The Island of Giant Insects. Her extensive filmography includes appearances in popular series such as Jujutsu Kaisen as a Government Employee, Kemono Friends as Capybara, Tokyo Revengers as Girl A, and Record of Ragnarok in multiple roles. Beyond anime, she has voiced characters in video games, with credits including roles in Blue Archive as Kurimura Airi, Princess Connect Re Dive, Monster Strike, and Phantasy Star Online 2 es.