User blog comment:KressKross/So everyone thinks Penny is a robot.../@comment-24119258-20131102041756

My reason on Penny being a robot/android/whatever-you-call-it, is that the way she talks and moves looked very mechanic. She reminded me of Aigis from Persona 3. Plus, one thing that I noticed very quickly were the green lines/lights that looked like circuts.

I may be wrong, but this was in my head when I watched the episode