Olof Björn Dreijer (born 27 November 1981 in Nacka, Stockholms län, Sweden) is a Swedish producer, DJ, and musician best known for his work as one half of The Knife. After experimenting with minimal techno under the pseudonym Oni Ayhun and releasing four EPs between 2008 and 2010, he shifted focus to solo projects, issuing the Echoes from Mamori EP in 2021. The following year he issued the Souvenir EP and the single "Rosa Rugosa" (2023), followed by the Coral EP (2024) and the collaborative Brujas EP, featuring the single "Brujas" with Diva Cruz (2024). In 2025 he issued the Iris EP and the single "Iris" (2025), and in 2026 he issued the Loud Bloom album and the singles "Echoed Dafnino" and "Plastic Camelia / Laurel", continuing a career marked by consistent releases and a commitment to gender‑balanced performances.
