Responses
Spoiler but this is just repeating others comments, so dont hate me if you read it already..
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Previously I read some comment where they said that Aseph is Zay s partner but his mark is not visible at the moment because of some demon or what. Don't know if it is true thought since I did not read the raws. And that person also mentioned that Zay has both of their seal, that s why Zay s seal feels different to other people with seals.╮( ̄▽ ̄)╭
I'm actually starting to think that he will get the mark later on from zai's love. Her mark is different and the goddess also said to/about asef that he will be loved or receive love. So I think zai has the power to choose her own partner/ asef. But he won't receive it until he proves himself like letting go of his revenge or something like that