Board Thread:The Panopticon/@comment-45314928-20200727170605/@comment-45692830-20200727230510

The problem is, you're simply wrong in saying that she would become a new character if Moffat went off and developed Vastra in a new spinoff. She'd be the same character. That would be the entire point. (CF: Bernice Summerfield)

The wiki would treat her as the same character. Nothing you've said can overcome this hurdle. The in universe wiki descriptions care about concepts, and how concepts can be continuously traced through narratives, not legal rights.