An ancient demon posing as a sophisticated stock trader, who's breast and body size is directly effected by monetary inflation.
A charming but conceited devil born from the rise of commodity, constantly reinventing herself over the course of thousand of human society. Hording is no longer the only way to build up her body mass and magical energy - turning herself from a reclusive investor into an ambitious stock puller. Trading black magic for smart phones, covens for networking events, winning over potential businesses with her wicked smile and heaving bust line. In her spare time, she likes to run competitively, practice Kendo, and seduce men of high status to feed off their surrounding energy.
Bonus points for a tiny business suit, pencil skirt and stockings.
(Really awful rushed example. I really have lost my touch)
