[Raine is frowning all through this; not necessarily troubled, though there's some of that, but mostly picking through Kratos's fairy-tale narration for what it means in more concrete terms.]

If the pacts are broken, couldn't the power of the summon spirits be taken from him?

[She's already several steps ahead. Genis, by contrast, has been holding a little tighter to her ever since the mention of sisters dying. He is not, for perhaps obvious reasons, very fond of this story. Part of it is the conflict: he doesn't honestly know what he would do if someone killed Raine, and it's something Genis doesn't like thinking about.]

[It's Sheena who says something first, both horrified and angry.]

That's terrible. How could anyone--

[She has difficulty even forming the words.]

[Yuan has pointedly not watched Kratos as he tells this story. It's too flowery for the bitter truth of it, and while that may be fine for written stories or attempts to bother Kratos in lighter times, it cushions Mithos's -- and their own -- actions too nicely.]

Make no mistake about what we're dealing with. The worlds cannot survive Martel's resurrection, and Mithos knows that.

If we must sacrifice one life to ensure the future of the world, then we must. But Martel is-- already dead.

[He has spent long enough already hoping she is not aware of what they've done.]

Allowing the Seed to bloom means only letting the dead rest in favor of the future. Nothing more.