Starting off as a stage performer, she began voice acting in numerous video games and anime series, with her first main role being in the game Toys Drive.
[2][1] She entered a high school with a theater department, where she gained experience performing on stage.
She became interested in voice acting after watching the Lucky Star anime in order to study her character in the musical.
[5][6] In April 2021, Koichi left Atomic Monkey and moved to Stay Luck.
[7] In February 2023, she started hosting a radio program on Nippon Cultural Broadcasting's A&G block.