9 is 3's older brother and twice her age.
Unable to have 3, 7 set his eyes on 9, who bore resemblances to 3, and developed affection for 9.
After spending some time together, 9 realized that 7 still had feelings for 3 - his vegetative biological little sister, and knew that as long as she was still alive, he would never receive 7's true love.
Thus 9 unplugged 3's life-support system and bade her the last farewell, thinking he had given her salvation.
9 began dressing up more like 3, talking with 3's voices and assimilating 3's personality, her every likes, dislikes and habits into his own.
Soon, 9 became 3, and he replaced in 3 in 7's heart.
But the more time they spent together, the clearer 7's memories about 3 resurfaced, especially his tortures on her just for the sake of revenge.
Unable to bear with the guilt, 7 lived his days with abandonment, until one day he encountered 6, who had been living like a hobo in one of the poor districts.
7 gave 6 a gun, and beckoned 6 to claim his cold-served revenge.
6 neither hesitated nor asked 7 for the reason. He simply put a hole between 7's eyebrows, his face void of emotion.
Mumbling "finally, finally, finally," 6 pointed the gun at his own head and squeezed the trigger.
Darkness claimed him, and he found himself in eternal peace.
