Dark Riku

Dark Riku is Riku Replica's time traveling heart in a new replica body. He was collected by Young Xehanort to serve as a member of the real Organization XIII.

Appearance
As Riku's replica, Dark Riku is identical to the real Riku in nearly every way as he appeared in the first Kingdom Hearts game. The most discernible difference between them is that Dark Riku has yellow eyes like the rest of the real Organization XIII, as opposed to Riku's aquamarine eyes, indicating that he harbors a piece of Xehanort's heart within him. He primarily wears the Organization's black coat, while also periodically shifting into his Dark Mode form at the Keyblade Graveyard.

Personality
Just like in Chain of Memories, this version of the Riku Replica considers himself to be the "real" Riku, and his superior. He behaves exactly as the real Riku did when corrupted by darkness, being arrogant, cruel, and remorseless. He also allows Sora, Riku, and his friends to believe that he truly is the real Riku's past self from when he was possessed by Ansem.