Kapitel 75: Chapter 75: Infuriating Threat

Atlas didn't have to fulfill the promise. He could just do whatever he wished now that he got what he wanted. 

Despite having that freedom, he didn't kill Yovana. He didn't have any compulsion to fulfill his promise, but he did feel like he should.

A promise to someone like Yovana didn't hold much value to him, but he still felt like he should at least try. He was in the body of Castiel, and he had promised in the name of Castiel. 

The only reason he received the opportunity to get his sister back was because of Castiel. Could he really spoil the name of Castiel by killing Yovana after promising her?

He also wanted to meet Atlan himself, and the safest way to do that was when Atlas was imprisoned. That way, he didn't need to worry about Atlan attacking him.