"In the ninja world, those who break the rules are trash, that's true, but those who abandon their comrades are worse than trash."
(To Sasuke) "I won't allow my comrades to die. I'll protect you with my life. Trust me."
"I don't care if you are one of the legendary Sannin, the great shinobi of legend, I swear take one more step towards Sasuke and one of us will die here!"
This makes me think that Kakashi couldn't have killed Rin.
"This place makes me think about the mistakes I've made in the pastů and I've made so many of them."
This is Fishy.