In a conversation with her friends, Saiki says, "Today, I will go shopping with Grandma for shosei" (shosei are students who are given room and board in exchange for performing domestic duties; in this case equivalent to private pupils), to which her surprised friends respond, "When on earth did you start living as a young lady?"
友人との会話で「今日はおばあちゃまと書生（内弟子）さんたちの買い物」と言ったところ、「いつの時代のお嬢様？！」と驚かれたことがある。