I wouldn't go so far as calling her a Stepford Smiler. She's genuinely nice and happy, she's not even depressed she can't count, maybe just a little regret. But she's the kind who would button down and work hard to learn, not get depressed.
Kogasa-chan, do you know what one plus one is?Check, please.Pride as a SeniorThe total comes to ¥380.Mamizou-san. Can you get that, please?Thank you for coming.Huh? Is that a riddle?Ah.Thank you for the meal.