If I have a separate character "holder" (like in this ecample) then I can drag out the whole character fully assembled from the project bar right?
That's a more meaningful difference, but we could still do that for object types in the Project Bar. I don't think this alone justifies adding a whole new section to the Project Bar.
We need specifics like this to be able to implement it - vague suggestions along the lines of "this would be a new thing", or just showing a screenshot of some UI, isn't actually useful when it comes to spending months implementing all the actual code for it. The key is: what does it do that's new, different, not covered by existing features, and not suitable for being covered with existing features?