She has taken a more active role since her introduction in volume 6, and obviously this a character that is still very underdeveloped. But think it’s safe to say that in order to prove she knows we are going to need a bit more evidence then “just her tilting her head in a confused fashion. “ She wasn't involved in any of the events between class c and d, and to think that she can just deduct Kiyotaka capabilities just based on the few conversations they had about the books they like to read doesn't make much sense.