ブラインダガー [blind dagger] in Japanese.
Airborne Brigade

R+
Type: Dagger, Element: -, Growth: Fast, Cost: 16
Attack: 1,270 (lv1), 4,174 (lv80), 4,520 (lv100), 4,834 (lv120), ? (lv140), 5,390 (lv160)
Defense: 1,230 (lv1), 4,042 (lv80), 4,378 (lv100), 4,681 (lv120), ? (lv140), 5,220 (lv160)
Obtain: any chest that gives this rank
Other: note that this dagger is modeled after Blinding Dagger from old FF14, one that was removed with equipment revisions near the start of the game service. The same model was used for Maddening Dagger
R
Type: Dagger, Element: -, Growth: Fast, Cost: 9
Attack: 680 (lv1), 2,229 (lv60), 2,414 (lv75), ? (lv90), ? (lv105), ? (lv120)
Defense: 650 (lv1), 2,135 (lv60), 2,313 (lv75), ? (lv90), ? (lv105), ? (lv120)
Obtain: any chest that gives this rank
Pictlogica

Stats (lv1): STR +28
Stats (lv10): STR +46
Buy: - (sell: ? gil)
Obtain: Condor Wildlands, initial equipment on Penelo and Rikku
Use: Poison Dagger
Type: Dagger, Rarity: ★★, Element: -
Category: Equipment