I have a question... I've seen that on some drawings Bacterial!France's right hand is like that but on others it's something like metal blades and on one work it's even like that with only one metal blade... I hope my explanation is understandable... And I was wondering, can he change them at his will, it happened with time or these are different designs for him... .___." I hope I'm not a bother... .____."
Well actually it's more that I like randomly changing between those three designs for his hand. Though the "official" one is the one that you see on this picture. The metallic ones come from the fact that the "bone" like material can break and be replaced or mixed with metal.
The limbs are made of organic material similar to bones, but they do have a sense of touch. It's even an important sense to them since they crawl in the dark. However,that bone-like material has the ability to blend and adapt with other materials to be stronger. Example: Italy grew limbs made of bone AND metal. But he still has a sense of touche.
However, it's a fragile constitution, thus this bone-like material can break quite often and regrow afterwards.
I don't mean to sound like a bother, but what is the backstory to this "bacterial" Hetalia stuff? Is it based on a fanfic or something? Either way, I like the Italies' design - with them merged together. The freaked out chibi England made me giggle. xD