Are we making a game or a standalone cozy scene? How will the bonfire work from the user / player perspective? You can connect anything to everything if necessary - but that’s the crux, is it necessary? Do tell! One generally chooses a specific tool for the job, this applies to input and communication, too.
If all that is needed is input processing for some random actor that is not gameplay related, you might as well just:
Now it will receive and consume user input.
I MIGHT be able to tell the bonfire’s BP to do certain things by adding a blueprint interface to the Third Person Character BP
The other way round, the interface would go into the bonfire actor, but using an interface requires a reference anyway.