Renji will wake up to find himself in a prison cell with a young man. He will be tall and lean, well built with short blonde spiky hair. He has memories of two different lives. One life he is a high school student who fights zombies. The other life he spends surviving in a wasteland after a nuclear fallout. Because he can't decide which is real he gets aggressive easily and will argue often. He might remind Renji of Ichigo in a way.