User blog comment:SolZen321/Noa/Nexus/Next Theory/@comment-1733689-20130809020142/@comment-5527544-20130809020837

Given that Himeya talked to Sera's spirit implies he either died or grazed the boundary between life and death. His returning with a greater understanding of the 'light' is similar to how Jesus came back and how he appeared one last time in front of Komon is similar to how Jesus left for heaven.