Sword

A sword  ( 검, geom ) is a weapon consisting typically of a long, straight or slightly curved, pointed blade having one or two cutting edges and set into a hilt.

According to Deod (Ch 16) as you get higher and higher up the tower, due to the high viscosity of shinsoo wide swords with high surface area don't exist. How much truth there is to this claim remains to be seen. Swords in one form or another must have some use as White Oar, the only known S+ grade weapon inside the tower, is a sword.

The Luminous June and Red October are the only 2 Swords in the 13 Month Series.

There are also special types of swords which include Ignition Weapons. Narumada is such a type of sword.

Hatsu's swords are also rather special and it's likely, he uses Shinsoo to move Sword That Flies Higher Than Any. The purity of Suspendium probably gives it the ability to float(not move), either by itself or through Shinsoo manipulation.

Characters shown using swords:

Espada
 * Hatsu who wields two swords ranked 7F.
 * Hong Chunhwa who uses the 7D-Rank sword Narumada.
 * Kon
 * Yung Changsoo
 * Deod
 * Hoshi
 * Palgyon