Y/n is the second of the Fatui harbingers, with a will so strong that she can harness the power of her own cryo vision and 6 of the Tsaritsa's delusions at once, one for each element. She has never loved or been loved, having been raised in a strict and cold family. She was raised to be perfect in everything she does, and perfect beings do not love. Even if one day y/n was to fall in love, it could not last, as the Tsaritsa's rule is "once a harbinger, always a harbinger".
Albedo is a homunculus, created several hundred years ago. He travelled for most of his life with Rhinedottir, who was his creator, his master, his teacher, but although she was the closest thing he had to family, their relationship was never based on love. He knows what love is, has studied it in detail, but he has never had the chance to experience it for himself. 'Can a homunculus even feel love?' he wonders sometimes.
Both of them have never experienced love, and neither expects to ever fall in love. But when they meet, somehow, despite all odds, that is exactly what happens.