It's easy for Skyfire to tell that Tsukishima has questions, but he won't pressure him into asking. While he's more than happy to answer nearly any question, he's aware that not everyone is comfortable asking said questions.

After they separated for the night, Skyfire spent some time looking around and scrounging for supplies. Managing to find some old canvas and some rope of questionable strength... but it would do as something to pack anything up they collected to haul back.

Even if he has no issues with Tsukishima walking for as long as he wishes, he does offer to carry his bag... since it weighs nothing to him. When they actually got to the cavern, Skyfire tilted his head and tried to get a sense of just what sort of task that they had in front of them.

"What are we looking for exactly? I don't want to accidentally bypass it or destroy it..."