Nursery Rhyme

ナーサリー・ライム, Caster (キャスター)

Alice's Servant in Fate/EXTRA.

Nursery Rhyme isn't an actual hero, but a general term for picture books. As they took on the dreams of many children, they formed into a concept and turned into a Servant. Its Noble Phantasm is a unique barrier called "Nursery Rhyme". It reflects the Master's heart and creates a Virtual-Servant in the form the Master dreamed of.