Greatsword (大刀) is a large single edge sword with a broad blade created and used by Welf Crozzo. It has power exceeding the Upper Floors. Because it is the weapon he uses himself, he did not name it. As long as it is not a weapon made for others, Welf will not name it.
Kinagashi (着流し) is smith clothes that have some resistance to fire and heat but its defense is low. Welf wears armor over it.