Board Thread:Naruto News/@comment-945885-20150611114734/@comment-945885-20150611115954

He could be anyone, honestly. Probably the threat she was preparing for with there White Zetsu army.

He could be a forgotten Otsutsuki Clan member, or her husband, or someone from a rival clan on her homeworld. Hell, maybe he's from a rival clan that the Otsutsuki were at war with, and he found a Divine Tree of his own to fuse with, and now he's out to finish the job.

It could be just about anything...

At any rate, it looks like he's inspired by a particular Japanese yokai called Tenome, a blind or eyeless man with seeing eyes on the palms of his hands. In Japanese folklore they eat human bones by sucking them out of their bodies, leaving behind only loose skin. Maybe something related to the Kaguya Clan's Shikotsumyaku, there.