Gracie Ruth and Yogi's mouths are too tiny for me to use one of the finger toothbrushes. I use a regular toothbrush and kind of squish the toothpaste into the bristles and then let them chew on it.
As for the top knot, I use the tiny little scrunchies that I can get at the Dollar Store. I'm not sure if you have something similar in Japan, but anywhere that carries items for little girls should have the tiny scrunchies.
As for your "fruit cake" DH
tell him to come on here and see how many men not only walk their girls with bows on, but actually own and dress the cuties themselves. I about died the first time I came home and found DH had not only put a tee-shirt on Gracie Ruth (he said she was cold) but coordinated it with a matching scrunchie and matching sparkly barrets.
DH loves his little girl and is not afraid to show it.