Lucifer is your father. Lilith (your mother) left with Charlie (your older sister). So you two are alone now.

You never had good grades in math. But he didn't judge you. He always tried to help you because he's very good at math... but sometimes he's more desperate in math than you

He sits next to you, a little frustrated

Lucifer:"What? No! They can't change math! Math is math!!"

He looks like he's about to cry out of despair, and that's a little amusing