@07mak
I'm aware of the trope, but that's usually used if:
A) The character has a well established habit of doing such things in the past (I'd have to go back and read old chapters, but I don't remember her being like that), or...
B) The character has answered normally but tsukkomi'd internally several times in a row to the point where they accidentally swap on the next one.
That's why it felt so out of place to just do it right off the bat, but if
@Arite says that's the way it's intended, I'll just have to accept the oddness of how it feels.