Ah, the dark arts. Every witch needs a sign, and here are some made specifically for 1/6 Scale Phicen / Tbleague dolls. Tested to fit well in the hands of p22 and p24 specifically, but I expect that any 1/6 scale doll will be able to make use of these pentagram sigils.
You will find two stls here: a thin and a thick sigil. I prefer the thinner one, and my cr-10 prints it no problems on .1 mm layer height. But if your printer has difficulty with that fine of detail, the thick one might be your fashion.
Enjoy some photos of Margaret posing in custom clothes showing her propensity for the dark side.