I noticed as I was watching a rerun of season 1-episode 2, "The Bird Scene" from 2010 that Kat's voice was not in a soft nature. I noticed this in a few of the episodes. I don't know when the voice changed began and would like to know. Does anyone know which episode she started to speak in the soft tone? Do you know what the reason was for the change? The only thing I can think is that the writer's thought a softer voice would make her seem more innocent to combine with her silly, 'clueless', nature.
So, what do you think?