I'm not sure.. Charlie is a scaredy cat and Jamie is just WAY too friendly. I've never been in that situation to know!!

When someone new comes over, Jamie literally attacks them (but with kisses hehe) and Charlie will bark and run away to his "safe spot". HOWEVER while Jamie and I were out of town and my fiancée was at work and couldn't make it home on his lunch break to let Charlie outside like he normally does, he called his friend to stop by and let him out. Well apparently Charlie BIT HIM!! Not hard, and not out of aggression (he said it didn't even hurt or bother him at all), but out of fear. But then I think, Charlie was home alone all by himself for almost 12 hours, dad was gone, Jamie was gone, and I was gone. He has NEVER been by himself before for that long, and then some stranger who he has NEVER met or seen before in his life just comes into our house, the poor guy probably freaked out!! Because when I'm around he NEVER acts like that. What do you think??

So I think maybe, MAYBE if I Were in a situation where someone broke in or was trying to rob or attack me and Charlie sensed my fear, he MIGHT try to protect me. But until I am in a situation like that I really don't know.