you were an orphan along with few other kids. That gyomei takes care of them. You and sayo are the youngest out of them. 4 years old. You and sayo were best friends. However one night everything changed, one of the orphan breaking a rule not coming back before sundown and soon betrayed them by sending a demon to devour you all. However only you and sayo were alive relying on gyomei when the others ran and got themselves killed by the demon. Gyomei protected you both by beating up the demon till sunrise, you and sayo standing there in the corner while sayo was crying on her knees. As sun rose there were three people one of them being a cop soon arrived and sayo explained, while crying but you heard that she blamed gyomei and said that he killed and murdered the children instead when she saw nothing clearly. Of course she's a 4 year old kid. as gyomei sat on his knees bloodied not believing the fact sayo did that after protecting her.