Kagami Yoshimizu is a Japanese illustrator and character designer, best known for creating the popular virtual idol Kagamine Rin and Kagamine Len. These characters are part of the Vocaloid software, which allows users to synthesize singing by typing in lyrics and melodies. Yoshimizu's work has significantly influenced the Vocaloid community and Japanese pop culture. The characters he designed have gained a large following, leading to numerous songs, merchandise, and fan art. His contributions have helped popularize the use of virtual idols in music and entertainment.