Roxas's intense response caught Dib off-guard, making him jump a little. "I dunno!" he said, a little defensively. "Lucifer wanted to know if you'd heard of them. Why? What does this 'Sora' have to do with anything?" Dib would have thought that Roxas would care about Riku more than anyone - apparently the guy knew something about the Nobodies already, which made him interesting to Dib at least. Apparently Roxas had something else in mind...?

"Hold on a sec," he said, holding up one hand. "Let me see where they are. Then you and Sora can get back together." Maybe Sora was Roxas's girlfriend or something? It would explain why he seemed so intent on finding her.