Yuusei lends a general hand in moving objects from storage into the egg dimension, though he makes a particular effort of locating and securing Carly's bow (and any arrows he might happen to find, though unlikely). It still ends up in the egg dimension with all the other stuff, but he makes sure it's in there before tending to other things.

If there's anything that needs to be carried outside of the egg dimension, he'll offer to secure it on his back somehow.