Sylphi (シルフィ Shirufi) is a Phantom born from a man called Nishikawa (西川 Nishikawa), when he gave up in despair. His Gate target is Yuzuru Iijima, a boy who got into an accident after he rode a bike which belonged to his friend Akari Kurata without having the skill to do that. He has the abilities to control the wind, fly in the air, and other movements all including wind and is equipped with a halberd.