Saho Shirasu is a Japanese voice actress born on August 19 in Wakayama Prefecture, Japan. She is affiliated with the talent agency Mausu Promotion. She made her debut in 2017 after winning the Grand Prize in a public audition held by Bandai Namco Entertainment for the project Minna de Game o Tsukurou: Project LayereD, which led to her first role as Ion Mirna in the video game Layered Stories Zero. Following her debut, she enrolled in the Mausu Promotion training school in 2018 and officially joined the agency in 2020.

Shirasu began gaining recognition with her first major anime role as Charlotte Arisaka Anderson in the 2021 series The Detective Is Already Dead. The following year, she starred in two prominent anime series: as Mio Kofune in the suspense series Summer Time Rendering and as Noma Rune in the fantasy comedy Immoral Guild. Her work in 2021 and 2022 also included roles in the Build Divide franchise, voicing Rinfu (also known as Rinka) in Build Divide -#000000- CODE BLACK and its sequel Build Divide -#FFFFFF- CODE WHITE.

Her career has continued to expand with a variety of roles in both anime and video games. Notable anime performances include Rusalka in Campfire Cooking in Another World with My Absurd Skill in 2023 and Yoko Shiraki in the 2024 Netflix series Time Patrol Bon. In the realm of video games, she is known for voicing Tsubaki Kasuga in the popular game Blue Archive, Resna in Atelier Resleriana, and Little Cocon in Uma Musume Pretty Derby. Her filmography also includes a wide range of supporting characters in series such as My Dress-Up Darling, Bocchi the Rock!, and A Playthrough of a Certain Dude's VRMMO Life. While she has voiced characters across multiple projects, no specific director or studio with whom she consistently collaborates is prominently documented. Her achievements include the aforementioned audition win that launched her career and securing lead roles in several television anime series within a few years of her debut.