Georgie
Finally got to Season 6 and while Georgie can sometimes be a bit of an annoyance to Mallory and the rest there's one thing I and everyone needs to remember; Georgie's a kid. Amy was right in saying "Grow up" to Mallory.
A 16 year old shouldn't get in conflict with a 11 year old but who am I kidding, it unfortunately happens all the time with siblings and parents getting into arguments, some of which even take their lives. *sigh*