She is a Upsorn Sriha [link] and she is a voodooist (or shaman). Upsorn Sriha have knowledge about voodoo and Thai's black magic. Her favorite punishment is make someone (that she hate) miscarry.
I don't know much about thai culture, but i can say i really like the drawing, the sadistic and crazy smile, the colors, the clothes, it all combine beautifully.
you set the bar for freakiness each time higher!
great design!
เธอน่ากลัวมาก ;w;b