Jan Van Ruthberg

A mysterious and powerful medium. He owns a shop called Golden Goose, where he sells illegal alchemy and magic supplies. A member of the Hell-Fire Club.

Spoiler

Also known as Cantarella, the assassin who kills with a kiss.

"...sees dead people. When he isn't busy exorcising restless spirits and having a dark secret, he runs some sort of alchemical supply shop-cum-manicure parlor. Okay, I made up the manicure parlor thing, but have you seen his nails? I rest my case."