As Anna acts weird, Mira somehow can notice her troublemaker friend's mind. Anna may dislike thinking complicated stuff or using her brilliant brain too much.
But, it didn't change the fact that she is someone with great insight comparable to Angus, who has boosted his mind by the system and Ancient power [Analyze]. Moreover, she is very sensitive toward someone who has physical contact with her.
She has a sort of ability to know the intention of the person she gets in contact. During the sudden brief of contact being carried by Aunt Extalia, Anna is surprised to feel the good intention from Aunt Extalia.
She knows strong people like Aunt Extalia will be able to perceive the dreadful and dangerous aura she subconsciously releases, especially at close range. This aura is one of the reasons people avoid getting near her.