Riku sighed and pushed some of his hair back with a hand, if only to have it fall back in his face before he looked at Rosette with still-orange eyes. "Heartless are a thing that dark people have made from the darkness in peoples' hearts. They're monsters that will do anything to have a heart, even if it's the most pure out there. Every light casts a shadow, the greater it is just means a bigger shadow." He explained the basics, as though to begin pulling someone into the world they knew. "But we're not made up of just hearts. Our bodies have to go somewhere, right? A shell is left behind, and it's called a Nobody. Most are just white creatures, but some..."

He looked at Sora, and gave a frown. "Fight that, and look human. That's the Organization XIII, they command the other Nobodies. I don't know if he was yours or not, but I think he might've been... I can't remember a lot more than that..." he rubbed at the side of his head somewhat, frowning even more before sitting back against the bench again from leaning forwards.

"They're somehow involved in this."