I use my real first name and a false surname.

I use my real name

I use Percy Jackson and Shadowhunter names

I use my real name

I use my real name on pottermore and my wizarding world fake name is "Crystal Crodding"

I use my internet name. Also known as Izzy960, my username. Or a false last name.

I use a fake name. Actually, my WW name is Lily Evans, I'm surprised they didn't react to that lol

I've used Nico diAngelo, Isabelle Lightwood, Annabeth Chase, Thalia Grace, Reyna Ramirez-Arellano, Jake Peralta, Frank Zhang...

@Eddietheflamingo Oh you're a genius LOL