She is a heavily featured character in fan art, merchandise, and cosplays.
Based on the search results, "Joan Alter" (often referred to as or Jalter ) is a popular character from the Fate/Grand Order (FGO) mobile game and anime franchise. She is a distorted, "Altered" version of the historical Joan of Arc, appearing as an Avenger-class servant designed to be a vengeful figure. Joan Alter
Grants a 50% Buster buff for 1 turn (level second). She is a heavily featured character in fan