jeanne d'arc alter (avenger) (third ascension) (fate)
Jeanne d'Arc Alter (Avenger) in her Third Ascension outfit. It looks similar to Jeanne d'Arc (Ruler)'s Third Ascension, but is colored black and has a different design for the torso. This is also the only Ascension form where Jeanne Alter has long hair.
There is a modified version of this outfit that Jeanne Alter wears as a party dress during the Shinjuku story event. It also shows up during the Meihousou Most Foul event, and in Fate/Grand Carnival. It was released in Fate/Grand Order Arcade under the name Violette Vengeur.
The dress that Jeanne Alter wears in the Holy Night Supper Craft Essence is also remarkably similar to this Ascension outfit, but there are differences.