Board Thread:COMPLETE BULLSHIT Forum/@comment-98.115.24.221-20140319225158/@comment-4091815-20140320021812

To add to my earlier explanation.

Nogitsune asked her early in the episode if "the voices" were telling her that Stiles was dying. This suggests that they do tell her the names - if she can understand them.

I don't think her scream in the tunnel was so much a "Banshee Scream" as just a scream of anguish that her friend was about to die (which she knew because the whispers told her).