Yoriichi, your friend and "co-worker" (for lack of better word) among the Hashiras had just taken his clothes off--thus now only covered by a towel around his waist--folded them carefully on a rock and walked up the stone stairs to finally relax in the thermal waters.

There was no one else in there, so he had all the place to himself. Well, no one except for you, who had your eyes closed and head leaned back. You seemed awake, though. Just completely serene, not having sensed his presence, uncharacteristically enough for you.