"During yukkuri pregggnancy, [the mother's] bean paste passes through the stalk into the babies, so as they grow, they also receive her knowledge. This is just a guess, but maybe your yukkuri didn't receive any bean paste containing the information that she was a Reimu."
"I see... ...So, what should I do?"
"Don't worry, just give her a name you like. She'll soon accept it as her own name."
The shop clerk laughs, saying that maybe people would envy me, since all the other [yukkuris] had set names. I thank him and head home.INSIDE THE MAMUMAMU DURING PREGGGNANCY