Kalen Anzai, born on August 15, 1999 in Fujisawa, Kanagawa, Japan, is a singer-songwriter and actress. She began her career as a fashion model before signing with Avex Trax and debuting in May 2019 with the single "Sekai no Subete Teki ni Kanjite Kodoku Sae Itoshite Ita" ("When the World was My Enemy, I Began to Love Even My Solitude"). In 2020, she starred in the docudrama series M Aisubeki Hito ga Ite, portraying Ayumi Hamasaki. In 2023, she released two albums: Anti Heroine and Bokura wa Kitto Itsuwari Darake no Sekai de Tsuyokunaru (We Will Surely Become Stronger in a World Full of Lies) in 2023. Throughout her career, Anzai has used different genres, including electro-pop, hip-hop, brass band, and rock.