~Collars? Maybe for like pets and maybe also Hige's collar?
~Bandanas? Bandanas facing different directions on the character. Like Jenna's from balto or facing down?
~Muzzle? A muzzle item sounds cruel yes but some peeps like that kind of stuff for rps.
~Clothes? Is that even possible having clothes items of characters o.o
~Signs? Idk how to explain this but maybe have some bracelet or something saying you wear a preset, your a map-maker, ect.
~Particles? Well I wouldn't know what to call this but what about moving items if it's possible.
~Scarfs? I was thinking scarfs like of Wolf Children, good movie.
~Bone? A character having a bone in their mouth?
~Weapons? Not something I'm into but maybe bows and arrows?
~Harnesses? Dog sledding, toothless's saddle.
No idea, probably more ideas but I was just thinking of random things off the top of my head XP