Hagoromo and Hamura

After being born in the aftermath of their mother's Infinite Tsukiyomi, Hagoromo and his twin brother Hamura lived in ignorance of their Kaguya's amoral nature and habit of looking up towards the sky. One day while resolving a conflict over water between farmers, the brothers meet a toad named Gamamaru who points them toward the mountains around the God Tree, and asks them if they know it. The two identify it as the Peak of Demise which their mother told them was off-limits, but Gamamaru reveals the land is weakening because the God Tree and the truth of a ritual practice Kaguya placed for the people to follow. Though Gamamaru told them to see the truth beyond the peak for themselves, the brothers instead encounter a fraud medicine salesman with Hagoromo learning of their mother is viewed as a tyrant in other lands. When Hagoromo notices a girl he cared for named Haori leaving to participate in the God Tree ritual to become its servant, he and his brother confront Kaguya over answers to the ritual. But Kaguya explains that the ritual should not concern them and this it is to prepare for coming of "the others." This forces the brothers to go to the Peak of Demise, Hagoromo awakens the Sharingan upon finding Haori and several others lifeless and bonded to the God Tree's roots. The brothers later meet Gamamaru as he takes them to Mount Myoboku where he uses a Memory Stone to explain the origins of the God Tree and their mother's arrival to the world. Gamamaru revealed that Kaguya revived some of the people she put under the Infinite Tsukuyomi, wiping their memories while having the God Tree draining the land of its natural energy. Deciding that they needed more power to confront Kaguya should she turn hostile, Hagoromo begins training under Gamamaru in use Sage Jutsu. Though Hamura lied of his brother's whereabouts, Kaguya soon caught on to her sons' scheme.