- This page is about a NPC Fate/Extra servant. For playable servant, see Playable Caster (Fate/Extra)
|Normal | Normal (Back)|
|Appears in:|| Fate/Extra|
|Voice actor:||Nonaka Ai|
|Character type:||Servant (Master: Alice)|
|Likes:||Playing chase, sweet tea party|
|Talents:||Nothing in particular|
|Natural enemy:||Dan, Twice, No Name|
|Image Color:||Light Blue|
Caster is "Nursery Rhyme", the embodiment of Alice's feelings on the subject projected onto a Reality Marble, Nursery Rhyme, to create a pseudo-servant. It is not a hero in the traditional sense, but the general term for any picture book that managed to manifest itself into a corporeal existence. It is a genre deeply loved by the children of England that came into being as a reaction to the half-voiced dreams of the young. It eventually emerged as a Servant who came a champion of the innocent. It formed the foundation for the book Alice in Wonderland, what was perhaps the best known work from the author known as Lewis Carrol, which began as a series of simple rhymes told to the daughters of a family friend while rowing down the River Thames on a warm summer's day.
Caster is Alice's identical twin in terms of her appearance; however, Caster's primary colors are black and purple in contrast to Alice's white and blue.
Caster is the mirror image of Alice with the same personality but she truly cares about her master and doesn't want to lose her. Unlike Alice, she is not shy, only emotionless and bored.
She is an irregular Servant created from the dreams of her master with the relic known as "Perpetual Engine - Maiden Empire".
Caster's abilities are linked to Alice due to their unique nature through Nursery Rhyme. Their main Noble Phantasm is The Queen's Glass Game, and they can create the Jabberwock and Nameless Forest. Caster uses physical strikes in battle despite her frail-looking nature. She uses The Plains of Winter (冬の野の白き時, ?), an ice attack spell, Frenzied March Hare (三月兎の狂乱, ?), a wind attack spell, and White Queen's Enigma (白の女王様のなぞなぞ, ?), an enchantment that lowers the enemy's magic resistance when she makes certain strikes.