Kylian Dekker, also known as Undefiant, is a 24-year-old frenchcore producer from the Netherlands. Undefiant has always been musical, teaching himself how to play acoustic and electric guitar at the age of 9. He started composing his own songs. Not long after, he was introduced to music from the 80s and 90s. That's when a strong appreciation for happy hardcore started to develop. When he listens to today's music, he misses the happy melodies and uplifting vocals he got so used to. Ever since, Undefiant has made it his mission to reintroduce the happy vibes from the 90s back to present day dance floors by experimenting with different sounds and styles. Thus, keeping his music familiar but ultimately "undefined".