I guess that these items are necklaces. They could be bracelets or dog tags or something.
@KuroNekoXIII I'm using the @ feature to call you. I found these items. What do you think these are?
Lol Cool! I had no idea you could do that!
I found it on E-bay, and they called it a "metal plate keyring strap"
Here's the link: http://www.ebay.com/itm/Anime-Guilty-Crown-metal-plate-keyring-strap-GAI-SHU-INORI-TSUGUMI-AYASE-HARE-/260427931009?pt=LH_DefaultDomain_0&hash=item3ca2b6dd81#ht_2481wt
One of the supporting characters of Guilty Crown. She is Shu Ouma's classmate, and she is also part of the motion picture research club.
Submissions can take several hours to be approved.