Cielo hadn't spent enough time around (regular, normal) people to be sensitive to what was going on behind certain expressions but he did find himself growing a bit uncomfortable with how the other young man was observing him. Normally, in a situation where he was uncertain, he'd just try to crack a joke or do something else silly in order to break the tension of the moment but he wasn't even sure doing that was a good idea around this particular guy.
"Wouldn't want to be caught alone with whatever's making that noise, yea?" Cielo agreed with a slight nod. He easily fell into step at Ryuzaki's side and he kept the pace, neither pushing faster nor slower. "Oh, I'm Cielo. I prolly should've said that sooner, huh?"