When Itachi was a traumatized child soldier ... Madara his Mangekyo Sharingan eyes, allowing Madara to gain the Eternal Mangekyo. Shisui Uchiha was Kagami's son and a close friend of Itachi ...

A great example can be found in Naruto through the relationship between Hashirama Senju and Madara Uchiha. Their dynamic ...

Madara's journey to awaken the Rinnegan involved manipulation, patience, and careful planning. The Rinnegan is the fusion of Indra and Asura's chakra, connecting the Uchiha and Senju clans.