Seeing his daughter's confusion, the Demon Sage explained.
"If it wasn't for Dyon, you'd have to be worried about this. But, I believe you don't have to now. Hypnos isn't actually a real person. Well, rather, he is, but you aren't the individual he was actually in love with. Hypnos passed a portion of his ancient constitution to protect his wife, causing it to begin to be passed down. As a result, there's both the aspect of reincarnation and love implanted within this constitution.
"Not only must you share the same constitution between two lives to reach this constitution's full potential, you must also share the same lover in two lives, or else the backlash of this constitution will be even worse than some others."