Some friendship kikilu because i cant help myself. So Luffy using killer as a pillow while he's waiting to annoy kidd - much to both kiki's general confusion. i just think luffy would more aware that killer might need some checking up on. Really, wano is killer's version of zoro's "nothing happened" vs kuma (and i refuse to believe luffy doesnt know something went down that no one will tell him about.) Additionally he's aware killer probably wont tell kidd or crew the extent of what they had to endure. And after udon, luffy kinda likes kidd and by exention - killer - and he doesn't want to see either if them hurt.

However Kidd's been too busy sulking so luffy ends up dozing off while waiting [i dunno if thats killers waist sash or his own noodle arms his using as a pillow] once kidd finds them he's as baffled as killer by the other captain's actions.