Hiroko Igarashi is a Japanese voice actress from Tokyo, born on February 27. She stands 157 cm tall and has been active in the industry since approximately 2005. Her career began with smaller roles, and her early work includes a part in the 2006 television anime Mushishi. Over the years, she has been affiliated with several agencies, including Genki Project and Air Agency, before entering a business partnership with V-FORK in January 2020. She returned to freelance work at the beginning of 2023.

Igarashi's filmography consists primarily of supporting characters in various television anime series. In 2008, she appeared in the anime Hyakko. She continued to build her resume with roles in the early 2010s, such as a student in the 2011 series Chihayafuru and a library worker in UN-GO that same year. In 2012, she voiced characters in Mysterious Girlfriend X and Kuroko's Basketball. A notable role came in the 2012 and 2013 anime adaptations of Maji de Otaku na English! Ribbon-chan, where she played Toner, a self-described familiar who contracts with the main character. Other credits from this period include Akane Shinome in Danball Senki Wars in 2013 and a master of ceremonies role in the 2014 series Yo-kai Watch.

Beyond anime, Igarashi's work extends to video games. She is credited with roles such as Ichiko Tachibana in Megazone 23: Aoi Garland and Yumi Kaburagi in A Certain Scientific Railgun. She was also part of the music unit pink☆away, formed in 2007 with fellow voice actress Yukki Hirata. Her personal interests include mountain climbing, singing, and crafting, with a particular talent for making plastic models. No major recurring collaborations with specific directors or fellow voice actors are prominently documented in her available biography.