Yamamoto is sincere. THAT GUY WHO'S CLEARLY IMPERSONATING HIM ON THE COVER... idk. XD

Kaoru best watch himself. THE STORM GUARDIAN IS EVER VIGILIANT except for that one time last chapter but shhh.

I have sometimes wondered if Kyoko isn't actually a female clone made from Tsuna's DNA and Yamamoto's personality. Like you said, they really are similar.

Now that you mention it, Visconti does look kinda familiar somehow; not sure if it's from One Piece or something else, but... hmmm.

Scars are definitely a Rain Guardian prerequisite. Either that or you have to chop off your hand.

AND YES. COYOTE FUCKING NOUGAT. He has appeared on all of two pages so far and already I want to give him his own tag JUST BECAUSE HE IS HIM.