Added as part of a collaboration between Azur Lane and World of Warships, Saint-Louis is based off of a Marine Nationale heavy cruiser proposal designated "C5". The project was intended to bolster France's cruiser forces after the restrictions of the Washington Naval Treaty had been lifted, succeeding Algeriè and similar ships. However, design work was suspended after the Fall of France, and no ships of the class were ever laid down.
She is named after King Louis IX of France, the only French monarch canonized as a saint.
Saint-Louis is portrayed with longgrey hair, red eyes and large breasts, dressed in crusader-inspired attire. She holds strong religious ideals, believing herself to be subject to God's will.
As a reference to the game from which she was taken, Saint-Louis has skills that improve her high-explosive damage and increase her speed for short periods of time.
