[Divaa]

Originally Posted by GuidoHunter_Toki

Spoiler:

Well how exactly the letter found its way to her is left open to speculation, but its probably nothing short of a miracle. As for how many years they had bee seperated I'd say some where around 10 to 15 years or more since Aya looked at least in her 20s and they were seperated as young kids.

Spoiler for How she got the letter:

The letter likely came from the sister sending all those letters with the mushi but that's what i'm thinking.

Pure speculation