Knight may refer to:
- A Military Rank.
- A Nobility Title or Rank.
- A Class.
- "The Maiden's Knight", a title and nickname associated with Estark.
- A Knight in Vermillion, a story arc involving Naota and Teletha Arnschent.
- Althean Knighthood, classification used to describe the military factions of Althea.
- Althean Red Knights, a faction within the Althean Knighthood specializing in light, swift melee combat.
- Althean Yellow Knights, a faction within the Althean Knighthood specializing in medium melee combat.
- Althean Green Knights, a faction within the Althean Knighthood specializing in heavy mounted combat.
- Althean Blue Knights, a faction within the Althean Knighthood specializing in ranged combat.
- Althean White Knights, a faction within the Althean Knighthood Royal Guards
- Althean Black Knights, a faction within the Althean Knighthood Espionage and Executions division.
- Amber Knights, the nationwide law enforcement agency of Willowscent.
- Blood Knights, the pirate crew of Redbeard.
- Dead of Knight, the gatekeepers of Eclassia.
- KNIGHT Jacket, a type of Barrier Jacket developed by Sir Chaddwick and provided as standard equipment to ECHO units.
- Knight General, a rank given to the four individuals ranked directly under the Arch Diviner of the Saint Church.
- Knights of the Apex, the regional armed forces of the Celestial Sphere.
- Knights of the Nadir, the shadowguards and personal attendants of the Nadir.
- The Nadir Knight, a rank within the Knights of the Nadir designated for Guard Captains and Personal Guards.
- Knights of the Nightmare, A private security force made up of war veterans, pirates, outlaws, and the lawless, they are employed by House Woldtvedt, under orders of House Kaphisilla, to protect the interests of House Kaphisilla and the neutrality of the Neutral Lands.
- Knights of the Reliquary, an ancient order devoted to the protection of the order of The World.
Knight Classes
- Temple Knight
- Holy Knight
- Black Knight
- Dread Knight
- Arch Knight
- Cavalier
- Chevalier
- Paladin
- Magic Knight
- Mystic Knight
- Myrmidon
