[Chibi smiles when Chrollo pets the spider's head; the spider itself is happy to oblige. So Chrollo has a soft side for spiders? Chibi can understand that; he has a similar thing for fish. All people have their biases, he supposes.]

Simple enough; when I took it apart, after I got past the traps, I found this. [There's a latch his fingers find, hidden within one of the spider's tiny niches, and it pops open to reveal tiny, secured inserts.]

I suppose you could strap something to his back, if you wished to transport something larger.