Actually, something I thought of with Cammy and Laura both having a near-identical scar is that it might be some kind of initiation wound that Bison gave them as part of becoming his student / apprentice.
I know that we don't have any solid proof that Cammy was "really" his Eldritkar, and not just another Doll before she lost her memory, but it would make some sense...
--------------------------- Jaymie "BZArcher" Wagner She/They @BZArcher / bzarcher at gmail "Life is change. Let’s live.”