sooo uh , was that the cats blood on seiichi's hands/face? if you go back to the first chapter you'll notice that his hands are clean, so there's clearly something we're still missing. Did he kill the cat ? maybe its just symbolism . Seeing himself as a kid covered in blood may be a...
In my opinion this isn't the body of shinra , like everybody's saying he has earings on , and even the design of his pants is different . The jagged teeth and white hair implies that this is the body of the Kusakabe brothers ancestor