Momoshiki Otsutsuki

Momoshiki Otsutsuki is a celestial being from the Otsutsuki clan who came to Earth seeking the chakra fruit cultivated by Kaguya. An arrogant and powerful god-like entity, Momoshiki views humans as inferior livestock to be harvested. He attacked the Chunin Exams alongside his servant Kinshiki, absorbing Kinshiki's power to achieve a fused form powerful enough to battle both Naruto and Sasuke simultaneously. After being defeated by Boruto's Rasengan, Momoshiki implanted a Karma seal on Boruto before dying, using the boy as a vessel for his eventual resurrection. He continues to exist within Boruto's body, periodically taking control (as 'Momoshiki' or 'Borushiki') and serving as both a power source and existential threat throughout the Boruto series.