Gertrude is a necromancer. No she doesn't go around raising the dead for fun. She could, but the smell makes her sick. No, she doesn't do fancy stuff with shadows and darkness, She finds it too creepy. No she doesn't play around with Aunt Marges remains. She could but dearly departed Uncle Freddy keeps telling her off.
No, She only deals with ghosts. The way she sees it, ghosts are perfect for spying on people. Or telling you who to kill. You see Gertrude also wants to be an assasin. Ghosts would also be great for making sure that no-one was around to see you kill someone.
Gertrude is 21 yrs old and according to her mother should be married by now. She is engaged to Arh Choo by way of an arrangement between their parents and she has been delaying the marriage for years. She has nothing much against Arh, except that by marrying him she will make her mother happy. That and the guy is drop dead boring.