Its in-game description reads "Short sword with a beautifully-patterned blade." As a short sword, it has the 6-hit combo and good Cyclone and Beast stats, so it's useful against animals. You can find the Choora in dungeons' chests, it cannot be invented but you'll be able to buy it at G-Weapons in the Gundorada Workshop when the shop itself is restored in the Chapter 5. It's a medium-tier weapon (Tier 5) : it'll gain 4 Synthesis Points (SP) per level-up.