mirror
His world is shattered as easily as glass is broken when Namine tells him the truth. For days on end he strides the empty white halls angrily, unthinking, just venting his anger on the Heartless who decided to pop up at the wrong time.
He is just a replica. Fake, worthless. Even his feelings for Namine aren't real – they are shadows of a fractured memory. Riku had always been in his place. He feels so empty. Riku Replica had been drained of everything.
Yet when he stands above Riku's corpse, Soul Eater dripping with dark, red blood, he doesn't feel any less empty. He is still a broken mirror, a shade without a reflection.