Imada Mio is a model, talent, actress, singer, and former gravure model. She was born in Fukuoka City, Fukuoka Prefecture on March 5, 1997. She is currently affiliated with the agency Content 3.

When she was 16, she was scouted in Shintencho. For a time, she was part of the modeling agency CGE. In 2016, she became the leader and center of the three-member group Sagemon Girls. She was recruited by BIGFACE (now Content 3) at the age of 19. She later moved to Tokyo and joined the agency with an interest in becoming an actress. Later that year, she starred in Nakagawa Shun's independent and acclaimed short film "Kalanchoe".

On November 7, 2018, she appeared as the main character, Miki, in the LINE mystery game "koToro" and also starred in its commercials. In December, she won the Yahoo! Search Award in the actress category.

In January 2019, she became the image character for a car purchasing and appraisal service called "Rabbit". She also ranked first in the "2019 Next Break Rankings" on the information site "Debut". She threw the ceremonial first pitch at the opening ceremony of the SoftBank Hawks vs. Seibu Lions game on March 29. In April 2019, she became an ambassador for a WiFi router alongside Sato Jiro.