i'm sorry but i have to put this,
this guys been mentioned twice in the whole manga. all we know is that he has sinister chakra.
it doesnt say that he fought the shodai hokage, it doesnt say he's a tengu
its says nothing, if you have proof otherwise i'd be glad to see it
also dont post a naruto fan forum link, the dark history of the uchiha. thats just a fanfic that ppl think is fact.
show me chapters