Board Thread:The Panopticon/@comment-9435571-20140927221308/@comment-146099-20141007151143

JagoAndLitefoot wrote: At the very least, she should be classified as a "narratively ambiguous" companion in the navbox, like Jackie Tyler or Jackson Lake are for the Tenth Doctor. Or Chang Lee for the Eighth Doctor. And the Maitland kids are currently classified as companions on the wiki.

Well, if it's not up for debate, there we have it. Those in the above quote are all companions, so yes, Courtney is undoubtedly a companion.

Wait before making the change if you like.