Due to being in his demonic state, the volcanic gasses doesn't seem to bother Rin. Neither does the ash or the fire spirits for that matter. Blue flames envelop his body as he starts ascending up the volcano. He then spots the small boy making his way up as well. It is an odd sight. Especially with the number of clothes he has, but he does seem well prepared for the situation.

He seems to move about the volcano with ease. So he must not be an ordinary child? Rin still worries for this child's welfare. "Are you okay up here...by yourself?"

Rin looks a bit concerned. Where were this kid's parents? Although, it's more likely that he's a god or a shinki, and doesn't have parents in this world.