The truth..
Kaien is really just a scrapped version of Ichigo. Tite originally created Ichigo with black hair but then realized that, when compared to Rukia's hair, there was too much black.
The truth..
Kaien is really just a scrapped version of Ichigo. Tite originally created Ichigo with black hair but then realized that, when compared to Rukia's hair, there was too much black.
Probably this. But from a story's perspective Ichigo is just the resurrected soul of Kaien.