Yes, I think this is doable!
You can use Bubble’s new plugin (Mouse & Keyboard Interactions) to trigger a workflow thru customs keyboard shortcuts. So the authors will be able to perform a bunch of actions very quickly.
And one of this actions may be exactly “create new character” thru a “CTRL + N” ( as an example).
So when an author presses “CTRL + N” you can trigger a workflow that will get the character name that in between #C and }. You can try this using the command :extract with Regex
After this, the workflow could insert this character in your database and so on…