Mystery Man Near Sasuke
Who is this mystery person near Sasuke? Here are the facts that we know:
1) He is barefoot and looks soiled (I am using the pronoun "he" by default. We do not know if it is a man or a woman, but there are definitely more male characters in the manga than there are female characters, so it's not a bad choice).
2) Tobirama does not recognize him
3) Karin doesn't recognize his chakra
4) Karin senses that the chakra is dangerous
So these are the facts that we have so far, which is not a lot to go on. Do we have any other guesses about who could fit all these facts?