Born the son of Sephiroth, Kiyochi was the younger of two sons, his older brother being Lost. When Kiyochi was just 3 his father was killed off by Cloud and his friends, forcing his brother to take care of him up until his end. About the age of 7 Kiyochi had to move on in the world alone, only to meet up with a group of people who would take care of him up until he was 18 and moved out. Now Kiyochi roams the world alone, searching for a reason for his existence.