Lee Yoonji, also known as Brenda Lee and Leenzy, is a Korean singer-songwriter born on November 16, 1995, in New York. She made her debut as a singer-songwriter with the single "It's Alright" in 2019, after participating in the Muse On 2019 event organized by the Korea Creative Content Agency. In 2021, she joined the band THE FIX as their vocalist and leader through the JTBC audition program Super Band 2. She has a striking, husky yet refreshing vocal tone with a soulful quality, and her high notes are characterized by a powerful, almost scratching sound that adds charisma. Her emotional expression is highly praised, achieved through skillful control of dynamics. She also excels in stage presence and performance, often captivating audiences with her stylish movements and gestures that demonstrate her natural stage charisma. As a singer-songwriter, Leenzy contributes significantly to both her solo work and THE FIX’s songs, most of which she has written and composed. Additionally, Leenzy participated in multiple drama soundtracks, including Confidence Queen in 2025, with her song "Am I Wrong" released on October 4, 2025, entering Melon’s Top 500 chart at number 8 the day after its release.