Keyblade Wielder, former henchmen of Maleficent and DiZ, best friend of Sora and Kairi, successor of Terra
Powers / Skills
Dark mode, control over darkness and minor Heartless summoning abilities, ability to use Keyblade
Competition with Sora
Defeat Sora and acquire his Keyblade (formerly), protect Sora and Kairi from himself, see all the worlds, become a Keyblade master, and maintain full control of his dark side
Friends / Allies
Sora, Kairi, King Mickey, Queen Minnie, Donald, Goofy, Yen Sid, Naminé, Axel/Lea, Roxas, Xion, Terra, Aqua, Ventus, Ansem the Wise/DiZ, various Final Fantasy, The World Ends with You characters, various Disney characters, Maleficent (formerly), Heartless (formerly)
Ansem and his guardian, Master Xehanort/Young Xehanort, Organization XIII, Maleficent, various Disney villains, Heartless, Nobodies, Nightmares, Sora (formerly), Donald (formerly), Goofy (formerly), Riku Replica (formerly), Axel (formerly), Roxas (formerly), Xion (formerly), DiZ (formerly)
Type of Hero
Will you take the road to light- or the road to darkness?
Neither. I'm taking the middle road.
Riku is the deuteragonist in the Kingdom Hearts series, and is one of Sora's best friends as well as his main rival. Kairi is his other best friend.
Riku is one of the main inhabitants of Destiny Islands. Maleficent gifted him and took him in with Darkness. Ansem the seeker of Darkness took control and Sora eventually freed him and defeated Ansem. To seal the Door to Darkness he stayed with King Mickey.
Chain of Memories
Riku travels the basement area of Castle Oblivion and confronted two Organization members and then met The King and DiZ. He then defeated Ansem and began his quest to control his Darkness and help Sora awaken.
Kingdom Hearts II
Riku in his Ansem form keep track of Roxas, Sora, and the Nobodies in the Simulated Twilight Town. He meets the Emporer and battles Sora in the Land of Dragons. He becomes his old form and works with Sora, Donald, and Goofy to defeat Xemnas and return home with his friends.
Riku teams up with Diz to help Sora awaken. He defeats Xion and calls her Keyblade a sham. He has Xion decide what to do. Eventually Diz is fed up with the delays, and has Riku capture Roxas and sends Roxas to the Simulated Twilight Town and he waits for Sora to awaken.