Don't commit Matricide!
This costume, thanks to UFO Catcher again, was easy to make. I caught the robe and the sunglasses, all I had to do was buy some 100￥ guns and I was done. All in all, a very cheap costume that looked cool.
Unfortunately, I was saddled with the nickname "Fatrix" (in Japan, the MAYtrix is pronounced MAWtrix...mat rhymes with fat.)