Do you think the look of the symbol here has meaning?
>Angel is cut in half
>Two triangles still standing tall
>One is broken and down
Perhaps the idea is that Kris ends up broken by the SOUL leaving them and Ralsei and Susie are the last ones standing?

Then the final tragedy could maybe be that Ralsei has to kill Susie to save the world or something like that?
Would explain the blood on his face symbolism and Susie emphasizing that Ralsei especially wouldn't let the last prophecy come to pass.