This bleach papercraft is Lilynette Gingerbuck's Sword, the paper model is designed by rexxkentrix. Lilynette Gingerbuck (aka Lilinette Gingerback) is an Arrancar. Apart from being an Arrancar, she herself is a sealed part of Coyote Starrk's power; when he uses his Resurrección, the two become one.
Lilynette has a sword that is drawn from the stump of the missing horn on her mask fragment. It resembles a scimitar with a standard katana hilt and an oblong guard. After merging with Starrk, her sword is seen to still be beside Ukitake, where it is in the process of disintegrating.
You can download the bleach paper craft model here: Bleach - Lilynette Gingerbuck's Sword Free Papercraft Download