Jeanne d'Arc

 Avenger is an Avenger-class Servant able to be summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order. She is also a boss-only character under the Ruler-class during the events of the Orleans Singularity. Avenger's True Name is Jeanne d'Arc (Alter), also known as Jeanne Alter, the Altered version of Jeanne d'Arc.