"A keening, a wailing and a scream. I believe the scream is the most potent, and something truly dangerous," which really made Mal's eyes twinkle just a little. She so adored dangerous things. "After all, there are certain levels of danger one could find themselves in, a different warning per level makes sense." Granted, it was entirely possible these things were different from her own world, it seemed that fairies were always of good nature in other worlds -such sickening things. After all, werewolves of her land were in no way as controlled as Derek.
Nor were they as pretty.
"I can attempt to assist in your learning, books on the history of the banshee will be important, provided you're willing to absorb the information. I can perhaps provide a safe environment to learn also." At least, safe from screams, she was making no promises about being safe from her.