User:SOTO/Forum Archive/The Panopticon/@comment-45314928-20200525010944/@comment-45314928-20200525034754

i think “single-adventure” should be for people that the Doctor either invited to travel with him or indicated that he wanted them to travel with him, but they ended up either declining / being unable to. Madame de Pompador, Astrid and Jenny were all offered, but died before they got a chance. And Joan Redfern declined an invitation, the Doctor still considered Joan a companion and visited her granddaughter during his farewell tour.

the “multi-adventure” should be for people who acted as companions over multiple stories, like Christina and Wilf.

then narratively ambiguous should be for those who weren’t vocally called a companion but acted as one for a certain episode (and who the BBC or other sources promote as companions). River Song should go here as I don’t believe she ever made a solid comment about travelling with the Tenth Doctor before (unless I’m forgetting something?).