Jade

is a Holy Knight of Liones, serving under the Tristan Platoon of prince Tristan.

Personality
Jade is shown to take his mission as a Holy Knight serious, calling out to Isolde to stop attacking Percival, believing that he was simply a child. He was reluncant in attacking him, hearing Chion's claims about him being a potential enemy, while not wanting to cause a panic, but soon joined in on the battle.

Same as Isolde and Chion, Jade is loyal to Tristan, following his orders without question, removing his power on Percival.

He shows respect for Holy Knights of higher ranks, such as Guila and those such as the Four Knights of the Apocalypse, showing annoyance that Chion attacked two of them. He, however, doesn't show the same respect for Donny, Howzer's nephew who quit training after a month. As shown when despite telling Chion not to mock him, he himself laughed at Donny too.

Chaos in Liones arc
Chion and Jade were looking at strange glowing stones in the sky when they see Isolde chasing Percival. Jade suggest that they must stop her, but seeing the Dragon Handle in the boy's possession, Chion says that he is a knight of Camelot so they both join Isolde. The three then attack Percival, Jade creates a dark sphere around Percival's head, blinding him. When Donny, Nasiens, and Anghalhad arrive to help Percival, Chion summons the Sylph again to suffocate them and allow Isolde to assault them with her Morning Star. When they intends to finish them off, the three are interrupted by the arrival of Tristan. Despite explaining that they are knights of Camelot, Tristan says that they are wrong.

When Lancelot arrives to informs everyone that Gawain, the fourth Knight of the Apocalypse, has escaped, Chion, Jade and Tristan go looking for him at the east gate of the kingdom. During the search, Chion questions if the Knights of the Apocalypse are really necessary. Jade reprimands him for doubting the king's prophecy, to which Chion says that he simply has a bad impression of Lancelot and Percival. Tristan defends his fellow Knights of the Apocalypse, but in the midst of the crowd, Chion separates from his companions and ambushes who he thinks is Gawain. Stating that he only trusts himself and not things like prophecies, Chion attempts to bury his target alive using his Gnome, but is stopped by Tristan and Jade who reveal that that guy is not Gawain but an apprentice who found the latter's armor.

Jade takes a detained Chion to the castle dungeon where he questions him about his actions. Chion berates him for doubting him childhood friend, but Jade insists that he tell him what his true intentions are to go against the Knights of the Apocalypse. Chion explains that he did it thinking of what was best for Tristan and to prevent him from being betrayed or delayed by these Knights of the Apocalypse in the worst case scenario. Jade concludes that Chion is too negative and asks why he just didn't express his concerns to Tristan, to which Chion says that he didn't want to be seen that way by the prince.

The two then discover a knight prowling the dungeon. Jade tells him that he is not authorized to be in that area where the prisoners of war are, but the knight says that some apprentices shouldn't either. Upon discovering that he is a knight of Camelot, Jade frees Chion and returns his staff to him. The knight deals a surprise sword blow to both of them, to which Jade recriminates his lack of chivalry even though the knight calls it a victory initiative. Chion scoffs that initiative is useless if they manage to fight back, but the magic from the previous attack begins to freeze both of their bodies. However, the two are saved by an explosion created by Guila. Chion is amazed to see the Vice Great Holy Knight, stating all the background information that he has about her, wich annoys Jade. When the fight between Guila and the knight breaks out, Chion suggests to Jade that they leave, but Jade refuses. When Guila reveals the knight's identity as Jericho, Jade recognizes her as a former Holy Knight of Liones and Lancelot's former teacher.

When Chion and Jade try to help Guila when she is at a disadvantage, Jericho avoids it by creating a wall of ice that Jade is unable to break with his weapon. The two watch from there as Guila breaks free from being frozen by assuming a demon transformation, but is once again trapped by Jericho's ice. When Lancelot arrives and saves Guila by throwing Jericho through a wall, he orders Jade and Chion to bring a frozen Guila to Thetis.

The night after the battle against Arthur Pendragon, Jade and Chion watch Tristan train with his swords.

Current arc
The day after the battle, Jade and Chion find Donny leaving his grandparents' house. Learning that he is Howzer's nephew, Chion scoffs at how he abandoned training and ran away and how his magic power only allows him to float things, to wich Jade tells to stop although he laught as well. Donny initially brushes him off saying that he is used to being made fun of, but when Chion insults Percival as well, Donny abruptly pulls him away with his Telekinesis and angrily tells him not to let him insult him. The feud is stopped by Gilthunder who informs Donny that he has an audience with the king and then questions Chion for his actions.

Jade and the rest of the Tristan Platoon participates in the meeting in the war room to discuss the situation with Camelot. When Thetis teleports everyone to a landscape that has been stripped of various parts, leaving only empty spaces, Meliodas explain that it is the result of Arthur creating a new Camelot, something he heard from Percival's grandfather who was a former Holy Knight of Camelot. When everyone is left despairing that they have no way to get to Camelot, Isolde and the others are shocked when Percival suggests they go on an adventure together to find a solution.

Abilities
Jade is able to shroud his opponents with a darkness sphere, hindering their vision.