I'll second Axe shower gel for vol6!Ciel. Even though he's about 13, he really wants to be seen as grown up. I've had to use it a couple of times when I run out of my own shower products and am too lazy to buy another (I usually share a bathroom with my brother at home) and it isn't overbearing.
For crossdressing Ciel, I've always liked tuberose. Now matter how pink or frilly the dress is, Ciel isn't the type for overly cutesy antics. A big part of his investigation was seducing the Viscount with how grown-up "she" was.
RIP CosRevo, Love Laugh, Sweety Pop, Cocosilver.