Caster (Fate/Grand Order - Mephistopheles)

Caster (キャスター) is a Caster-class Servant able to be summoned by the Protagonist in the Grand Orders of Fate/Grand Order.

Identity
Caster's identity is Mefisutoferesu.

Personality
Caster introduces himself as "the man who was born to be a Servant." Although he may seem loyal at first glance, he has an extremely cruel personality, so he would have no qualms killing his own Master if it amused him enough. He mockingly states that he is a pacifist and that there is no one greater when it comes to serving with loyalty.

Abilities
He wields a pair of scissors.

Development
Koyasu-ko (コャスコ) is his nickname in Fate/GUDAGUDA Order because he is voiced by, who also voiced Caster.

Creation and Conception
Shimokoshi is the character designer for Caster.