Oya is an Osha and is closely related to Iku, the divinity of death. She is the promoter of storms, hurricane winds and sparks. ... Oya is the Orisha of the Niger River, formerly called Oya, by its 9 tributaries. She was born in Ira. Oya is one of the so-called Orishas of the dead with her sisters Obba and Yewa.