Board Thread:General Discussion/@comment-25926288-20151026005934/@comment-6175354-20151026031501

Anubis16 wrote: This may be a dumb question, but who's Vortigan No one.... it is a just placeholder name.

The opening scene implied, that the first Dark One was the woman Merlin truly loved. Which is why he would not kill her, and why she was wearing a mask.