upon a timeRiku is a character in the video game series Kingdom Hearts. He is the main character's (Sora) best friend, but as one soon learns in the first game, he's not exactly on the same side. Alas, he is not the big bad villian. An antagonist for some time, perhaps, but most definitely not the main one. He uses a variety of weapons, but his main choice ends up being a sword called Soul Eater. His element is usually darkness, though eventually he ends up using light as well. By the end of Kingdom Hearts II, he loses all of his dark powers, and is left with only light. He's currently slated to return in the next title.