Looked it up - Vittorio was Grey Cloak, not Madrigal. Some thoughts, with wiki quotes:
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Vittorio Malvora is a son of Lady Cesarina Malvora, and a vampire of the White Court.[1] Harry Dresden nicknames "Grey Cloak" by Harry Dresden before learning his name.
White Vampire - can induce overwhelming fear and despair in people - sounds a lot like the "utter sadness" ability
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Throughout most of White Night, he is identified as a tall man in a grey cloak. That description causes most of the local magic community to mistakenly think that the killer of practitioners is Harry Dresden.
Wears a cloak - check.
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During the events of White Night, Vittorio was involved in a plot to "cull" magically attuned women
So perhaps his VCs here are something similar? Kill many/all the humans (normals, werewolves, wizards or otherwise), including an ability to help him kill them while escaping?
(I know, I didn't really need to use the wiki but it helps put thoughts together and reminds me of things I forgot)