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.
She is best used in teams that can provide critical stars to maximize her high critical damage potential. Jeanne d'Arc Alter | TYPE-MOON Wiki | Fandom Joan Alter
A party-wide damage boost that doubles for [Dragon] trait allies (level last). Based on the search results, "Joan Alter" (often
Born from a wish upon the Holy Grail by Gilles de Rais, she represents a twisted version of Jeanne d'Arc seeking revenge. Over time, she develops into her own person rather than just an imitation of her saintly self. Jeanne d'Arc Alter | TYPE-MOON Wiki | Fandom
Boosts critical damage (+50%) and star gathering rate for 3 turns (ideal to level first).