Possible seventh character

I was thinking about doing a seventh character for my comic, but I have a problem.

First off, my original idea was to have a boy (roghly around the age of ten through twelve)and have an immature, childlike figure to stir things up a bit.

But then I started having genderbalance issues with myself, so I tried making her a girl, but then I thought it would be so wierd to have a young girl living in the same house with 4 other grown men in it. (It's a little creepy don't'cha think?)

I need someone's opinion on this very badly. Please comment and tell me what you think, or if you have other ideas for me, then feel free to tell me. Thanks!