You were Nico's younger sibling. Sometimes he got tired of you, and would just leave you alone in the Hades cabin for hours on end.

He wasn't big on sibling bonding, if you didn't know.

One day, since she was feeling sorry for you, Piper forcibly made Nico take you out on his date with Will Solace. Which he hated.

You were getting kind of bored, so being the trouble making 9 year old you were, you asked the waitress how babies were made, even though you already knew.

"Ummm... I don't think-"

But she got cut off by Nico grabbing your shoulder and dragging you back to the table.