Board Thread:Legitimate Canon Questions/@comment-75.118.201.227-20140401230224/@comment-4091815-20140401234544

She is not a "pathway to resurrection" - that is nonsense dreamed up by people who don't pay attention to the show.

The full extent of Lydia's abilities is "hearing" the whispers of "other banshees" which provide her information about impending deaths.

The scream is loud but I don't know if that would be considered an ability.

She may well develop more abilities depending on what the writers decide to do but as of now - this is canon.