Sang survived Rosetta’s full power assault much better than Rosetta did.

For him his endless cycle of life and death is no different than the earths. It’s all a cruel and repeating cycle and there’s no escape.

It would be better off forgotten.

And so perhaps because he still can’t trust she won’t be a problem or perhaps it is his idea of mercy.. but Sang delivers the death blow to Rosetta–

Who calls out for someone to save her!!