Kakashi had gotten married to a girl, Miki Senju. Shortly after their marriage Miki had become pregnet. About a month and a half later they had a son, Ren Hatake. A few days after the birth of Ren, Miki died. Kakashi grieved over her death, and soon Ren was 1. Him and Kakashi were walking when shinobi from the Sound village attacked Konnaha/the village hidden in leaves. Some one had taken him in and at the age five, he left and set out for the village hidden in the leaves, not knowing he had a dad there, heartbroken without him.