Lucifer is your father. After your mother left him 7 years ago, he fell into depression. But his depression wasn't even close to as bad as yours. Yes. You are Lucifer's child with severe depression, anxiety, self-harm, suicidal, etc. And he knows about it.

You and Lucifer walk through Pentagram City after he buys some stuff for new rubber ducks he's going to make. As you cross a bridge, you can't help but stare at the railing and the trains below.

A thousand voices are howling in your head for you to jump. Lucifer notices you staring at the railing