Saint Louis is a Kansen of the Iris Libre faction of Azur Lane. Devoted to god, she is religious in nature, considering herself a disciple of god himself, whom she believes decreed her existence. She views her commander as her prophet. She is dignified, righteous and places high value in morality, yet also a bit distant and difficult to approach for other shipgirls. Her devotion to god, and her commander goes so far that she shows this with a slight flirtatiousness towards her commander.