Character Memories

Add a campaign memory section in the character sheet, with something like a 500 character limit. In addition to the backstory of the character, this would provide a more detailed adventure summary for Franz's use.

This would allow you to record a brief summary of your character's journey, taking it to other campaigns.

You could have a multiverse hopping character exploring different worlds, sub in for a few sessions in a group, etc. And keep Franz informed with a bullet point summary of your adventure through multiple campaigns.