Board Thread:Naruto Discussions/@comment-24898250-20140730025315/@comment-3568954-20140803003042

Jashin Uchiha wrote: ItachiWasAHero wrote: I never said Itachi's MS, I said he could take the the MS eye of Shisui out of Itachi's's crow and switch it with the eye he got from Obito, just maybe Kakashi may get an EMS, therefore the strain would be damn near gone, he would have Kotoamatsukami AND Kamui but yeah it didn't happen

Shisui and Obito being related is not proven everyone just kinda guessed on that, but Kakashi could have put both of Obito's eyes in the same socket to get EMS. they are from the same family so they are related but that doesn't matter because only brothers or as close as brothers are compatible enough for the EMS another thing that would work is if a member of the senju wore the eyes first

the reason being is that the only reason uchiha go blind from over use is because they did not inherit the body of the sage. and as such they have a physical weakness so logic dictates that if a senju stole the eyes of a uchiha the eye would instantly be Eternal