Honor The Knights Of Gwyn

Alright so it goes like this, the Lord Gwyn is a very important fellow and he felt the need to have an elite group of knights for his biddings and his protection, The Four Knights of Gwyn, and they each bore a ring to resemble thier rankings among the others and to represent their service to their king. Dragonslayer Ornstein:

According to the item description of Ornstein's Armor, Ornstein is believed to be the captain of the Four Knights. Ornstein is the only one of the Four Knights that must die by the player's hand in order for the story to progress.

Artorias the Abyss Walker:

Artorias, as one of Gwyn's four knights, was a fierce fighter. He was the first mortal known to traverse the Abyss. He has been corrupted by the Abyss and so he has gone mad. Hawkeye Gough will thank the player for setting Artorias free with honor. Artorias' greatest companion was Great Grey Wolf Sif who fought alongside Artorias in the Abyss. Artorias saved Sif from corruption with his Cleansing Greatshield and then was corrupted by the Abyss. 

The Lord's Blade Ciaran:

Lord's Blade Ciaran was part of the Lord's Blades, a group of assassins. Known for her unique porcelain mask, she was rumored to be the lover of Artorias the Abysswalker. She is found in the arena where the player fought Artorias. She asks the player for his soul if the player has it. If his soul is given to her, she will give the player the Gold Tracer and theDark Silver Tracer. Killing her will give the player both tracers and the Lord's Blade Set.

Hawkeye Gough:

Hawkeye Gough was the leader of Gwyn's archers. By the time the player meets him, Gough is blind. Gough will be found after the fight against Artorias the Abysswalker up some stairs. The Crest Key will be needed to open the door to Gough's tower.  Gough was still able to be a great sharpshooter, proving himself by shooting Kalameet out of the sky in order for the player to beat him. Gough is one of the only two of Gwyn's knights that the player isn't forced to kill, the other being Lord's Blade Ciaran. Ranked among Gough was Pharis, which is impressive because Pharis is only human.