|Data di nascita||August 15|
During his childhood Ikki, along with his brother Shun, was one of the 100 orphans that got taken into the care of the Graude foundation, owned by Mitsumasa Kido. Unknown to the boys, Mitsumasa was actually their and the other 98 children's father. They trained their bodies to be able to become Saints of Athena. As it was time to travel to their training location to gain the cloths, Shun picked the ticket to the Death Queen Island - a terrible place that no one had survived. Ikki then took his brother's place and went to the island instead. There he endured tough training, under the tutelage of Guilty. He tought him how to use hate to magnify his cosmo. In the anime he was able to kill his master after 6 years thanks to the hate Ikki had for him because he had killed Esmeralda, in doing so earned the Phoenix Bronze Cloth. In the manga after killing his master Ikki takes the Phoenix Cloth from the Black Saints master Jango.
He returns to Japan to steal the Sagittarius Gold Cloth during the Galaxian War tournament. He was ready to kill Shun but was challenged by the Wolf Saint, Nachi. He easily defeated him using his Phoenix Illusion Demonic Fist. After the intervention of the other bronze saints Ikki fled with the Gold Cloth.