Yamamoto does not really consider these things. He is just glad that he did find the bomber, they'll have to try and figure a way to get him big, but that is probably more Gokudera's department than it is Yamamoto's if he is honest. All he can do now is transport and protect the shrunken hitman.

It tickles a little when Gokudera moves, but then he settles in, and the baseball player feels the warmth from that spot, it's relaxing and really overall just makes him sleepier. It's one of the dumbest things he has done, getting this cozy on the snowy ground, thankfully for the moment, while he is exhausted, his everwarm potion at least seems to be keeping him warm.

By the time the fleeting thought that they need to keep going entered his mind, the swordsman is too far gone, his eyes heavy and in moments he is asleep.

It appears he will be staying that way till the morning when they awake with the magic having melted the snow in a big area around them, but not banishing the morning chill or the warmth that comes from a friend tucked in close. That in a sleeping body and mind means snuggling into closer without registering where or what is going on.