Character Sheets with player-added images?

I have a quick question- Right now I'm making a custom character sheet for a Jojo's Bizarre adventure RPG. Long story short, in this system, every player has two separate characters they control. Because of that, I wanted to add a little box for players to add the picture of a second character on their character sheet. I know the Bios section of a character sheet has places where players can upload a picture of their character, but does the Roll20 have a way to add that image-uploading feature to the section of a character sheet we can customize?

Unfortunately, no.

Something you might want to consider. Edit the pictures on your computer before uploading them to show both characters in one image. You could also do a multi-sided token for the character (with a different token face for each character)