@hispanicweeb
They were of a "notable shape" by historical accounts. Her fate depiction is based on a girl she inhabits but it is supposed to be "close" to the original Jeanne. The "booba design" of fate is their own artistic take of her, in real life her armor would have more like how classic art depicted her, like regular plate armor.

----
Jean d'Aulon, her squire and bodyguard: "Even though she was a young girl, beautiful and shapely, and there were many times, when helping her to put on her armor or otherwise, I have seen her breasts [i.e., the shape of the breasts underneath her tunic: clothing was always worn with armor, needless to say]; and sometimes her legs completely bare when dressing her wounds, [i.e., at the siege of Paris where she was shot in the thigh] and I went near to her many times, and I was [at that time] strong, young and in my prime, never did I feel carnal desire towards her from any sight or contact I had with the Maiden; neither did any of her soldiers or squires, based on what I heard them say many times." (For the original language, see: DuParc's "Procès en Nullité...", Vol I, p. 486; for translations, see Oursel's "Les Procès de Jeanne d'Arc", p. 356, and Pernoud's "The Retrial of Joan of Arc", p. 154).

Duke Jean II d'Alençon, one of her commanders: "Sometimes in the army I slept in the field beside Jehanne and the soldiers, and I sometimes saw Jehanne prepare for sleep, and sometimes saw her breasts [again, only the shape: she always slept fully clothed, according to the other eyewitnesses], which were beautiful; however, at no time did I ever have any carnal desire for her." (For the original language, see: DuParc's "Procès en Nullité...", Vol I, p. 387; for translations, see Oursel's "Les Procès de Jeanne d'Arc", p. 290, and Pernoud's "The Retrial of Joan of Arc", p. 142).
----