[@sempis] If you don't mind being someone not associated with the main two groups and coming along at one of their many stopping points on this adventure. Essentially a stranger that decides to join them.

In the character tab there is the 'others' sheet. 

If you want a reference, Beastofdestiny has an 'other' character: [url=https://www.roleplayerguild.com/posts/4870756]Hugo[/url]