Okay, you are right. She is called Quist Claus or Quistis Claus on Quistmas. And she becomes a real, fleshed-out, living, breathing human being with tons of magical properties, summoning Eden and flying around giving Final Fantasy-based gifts to the entire population of Earth, but only on Quistmas Eve night, while you are asleep, she sneaks in and places the presents under the Quistmas Sword in your living room, much like Santa Claus on Christmas under a tree.
You already know this, but Quistis is an FFVIII character, so Quistmas has to do with Final Fantasy. At first, Quistmas was a play on words only. I was just giving Quistmas meaning. But, if that is what you want, so be it.
