The first hero named Shining Knight was Sir Justin - a knight of the round table in the days of King Arthur. One day, while riding to battle an ogre named Blunderbore, Sir Justin was attacked by outlaws. As he fought them off, his lance scratched a tree, releasing the wizard Merlin. In gratitude to the knight, Merlin enchanted his sword and armor and gave his horse wings, renaming him Winged Victory. Merlin's gifts help Sir Justin prevail in his battle with the Blunderbore, but not before the ogre buried him and his horse in ice.
Sir Justin and his horse spent the next centuries in suspended animation before being revived in 1941 by Dr. Moresby. He took the name Justin Arthur for his civilian identity. He would fight evil wherever he found it, joining both the All-Star Squadron and the Seven Soldiers Of Victory. He also had a romance with Firebrand (Danette Reilly), who was slain by the Dragon King. He served as Winston Churchill's body guard Justin Arthur and took on a side kick named Squire. In a final battle with The Seven Soldiers of Victory with The Nebula Man. The energies that were released displaced the Soldiers to separate times. Shining Knight was placed in the era of Genghis Khan.
They were all brought back together by the efforts of The Justice League. He back amnesiac for some time and his memories would not come back until an encounter with Stripesy and his straighter Courtney, the team of Stars and S.T.R.I.P.E. Justin joined his Soldiers of Victory for a revenge encounter with the Dragon King. He has a new high-tech armor that was voice activated to expand and collapse.
He joined the JSA during the Our Worlds at War epic, but has been seen infrequently.
Other versions of the character has been present.
In Kingdom Come, a futuristic Shining Knight make his debut as background character.
In the Silver Age event, Gardner Grayle used also the name of Shining Knight.
In Seven Soldiers, a new female Shining Knight from a pre celtic arthuric debuted.
Shining Knight was a recurring character in Justice League Unlimited. This appears to be the original version, Sir Justin. He was frequently teamed up with Vigilante.
Sir Justin's greatest moment was in the episode "Patriot Act". After the General had brought the other heroes down, he kept dealing blow after blow on Sir Justin who refused to give up no matter how severely injured he got. He was willing to die to save innocents, but luckily, a few of the onlooking civilians came to protect him and made the General realize he was the bad guy here, not the Justice League.