Subject: I wouldn't recommend it.
Author:
Posted on: 2016-03-16 05:14:00 UTC
Iximaz posted a response while I was writing mine out, but I wanted to express my thoughts anyway. While using canonicals has been done in the past, I believe that PPC characters should be of your own creation. Yes, we may "adopt" or "rescue" badfic characters, but we shape how they develop. They become something new, something transformative, something that is wholly ours. I would argue that is far more interesting than just trying to ape another writer's character.
There's nothing stopping you from creating versions of a canonical character. Badfic provides plenty of rationales for why a slightly-off clone/twin/reincarnation/replacement of a known figure might exist. Paddlebrains and Dafydd Illian are both examples of this. They used Sirius Black and Maglor, respectively, as templates, but ultimately became their own characters.