Dark Riku

Dark Riku is a replica of Riku, much like with the previous replica that was created based on Riku. Dark Riku was created to serve as a member of the real Organization XIII as one its members.

Appearance
Similar to the first Riku 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
Dark Riku is initially mistaken by Mickey, Donald, and Goofy to be a time-displaced version of Riku from when he was possessed by Ansem, due to the way he behaves - a ruder, more spiteful version of Riku's personality in the original Kingdom Hearts. He is seen mocking Sora and later Hiro Hamada due to their reactions to his appearance and the appearance of Dark Baymax, respectively. Like the original Riku Replica, he sees himself as Riku's better and proclaims the real Riku to be a fake, despite the opposite being true.