Subject: It would depend, I think
Author:
Posted on: 2008-07-05 18:57:00 UTC
With the Doctor, each time he regenerates, he's a new character, with a different personality. From what I know of Romana, she's the same way. If you made large changes to Ace's character, I'd say OC. If she's mostly the same, than canon.
Personally, I'd say something like "AU canon" or "mostly canon."