Caster (Fate/Grand Order - Anastasia)

Caster (キャスター) is a Caster-class Servant appearing in the Lost Belts of Fate/Grand Order.

Identity
Caster's True Name is Anastasia (アナスタシア). She has been referred to as a princess by her associates, but her exact identity has not been revealed. She is a Servant of the Lostbelt, worlds removed from the Greater History of Man.

Appearance
Anastasia is a beautiful girl, having long white hair and a fringe covering her icy blue eyes. She wears an ornate white gown and a white fur cape with gold designs and blue lining on. She is seen caressing a doll.

Second Prologue
She is first seen in the snowy mountains presumably just outside of Chaldea commanding the Oprichniki before leading to the assault of Chaldea.