Anya not being afraid

Reading too much into this so if u think its stupid, it probably is
Usually kids their age get scared after an encounter like that and mentioned that all of them were too scared and cant even enter bathroom alone. But Anya knows what actual fear is, she used to be a test subject herself after all so even after all that scary ghost encounter, Anya's the only one who still acted normally even if it was just right after the scenario.