On S1EP13, Ash is introduced as someone with a scar in her face, that she said was the only wound that would not heal. But in season 2 she doesn't have that scar anymore, so how come? That, and at the end of EP13 she says she wants to change her codename and the guy says that's ok... So why is she still called Ash in season 2, even though she clearly has her memories back so it should have happened after EP13?
BlackGeneral 
Re4v3r 
Natara
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About the scar I don't really know,she wouldn't lose it cause since she had a flashback it's the thing that remember her things happened on the island **BUT I strongly thing that it's correlated to the virus that enrage people but kinda like regeneration they're bodies**