There are three artists called XI: 1) xi is a japanese instrumental alternative/indie doujin artist. He was previously a part of the 100sec Records label, he is well known for his compositions for BMS events. His style composes of a very melodic use of piano. He also commissions for Diverse System albums. 2) Xi is the name of a doujin artist from the circle AQUAELIE that makes metal arranges of touhou music. Read more about XI on Last.fm.