User blog comment:ElectricEnder222/Volume 2 Episode 4 Discussion/@comment-18396318-20140815023145/@comment-2006510-20140815045433

Well, Ruby is a fairly hyperactive Genki Girl; overacting sorta comes naturally (and isn't necessarily a bad thing by itself)

Plus apparently it's a matter of taste rather than fact, as you're literally the only one I've seen so far who had any issue with that specific bit of voice acting