Sora ran up and past where Riku had ducked into, since he didn't see him do it. Once he realized he hadn't seen Riku in a bit, he ran back.
"Riku? Riku?" he called out. You know, he really hoped no one was quite trying to sleep yet.
He ran into a guard that was randomly patrolling and asked him if he'd seen the boy. He apologized that he had not. Barty came running up and without a word, beckoned the Prince to follow him, pointing to where he had seen Riku go. Hey, it was the Prince. He was allowed to cheat.
Sora ducked inside and started wandering. It was too dark though. "Riku? I do not want to lose you. Are you here?"