#also 21 is a number in the fibonacci sequence which is already narratively significant and Yumi mentions that year ''19'' is important

[ultimateinferno]

Fun fact about Yumi and the Nightmare Painter: The Coppermind lists their ages as 21 years old even though the book itself says they're 19. That's because the curators of the Coppermind took into account that the book is being told to a Rosharan with Hoid mentioning he's deliberately converted the ages for them and the wiki converted the ages back accordingly.