Gawain

is one of the Four Knights of the Apocalypse, the niece of Arthur Pendragon of Camelot, and the current inheritor of the power of Sunshine.

Appearance
Gawain is a small young girl with dark-blue short hair and green eyes.

While using Sunshine, Gawain becomes much taller and well-built.

Gawain wears a full suit of white armor with gold trimming and a face-concealing helmet. Before leaving Liones, Gawain is given a new outfit reminiscent of a mix of Merlin's and Escanor's clothes.

Personality
Gawain is secretive as she didn't remove her armor for the entire time that Tristan escorted her back to Liones and after Tristan had left her inside the castle alone, she immediately fled and ditched her armor since nobody knew what she looked like underneath and allowed her to blend in with everyone else.

At first glance, Gawain is portrayed as a rather kind person when she tried consoling Isolde, who ran from Tristan out of embarrassment. Her first dialogue with Isolde suggests that at the very least she can be attracted to women, as she explicitly and openly flirted with her, talking about romance and love.

Gawain has a rebellious side to her as she claims that she doesn't like following anyone's orders, evident in how she left the castle despite being asked by Tristan to stay put until Lancelot and the others arrived. In addition to this, she is also callous as referred to Pellegarde as a "sniveling little fire-eater" just for talking back to her and then using her magic to blow him back for ruining her "romance" with Isolde.

Underneath her elegant manner, she is petty and very quick to anger to those who personally wrong her, even if their offenses against her are minor, such as wanting to kill Pellegarde not for being an enemy knight or for putting others at risk, but simply for calling her a "little girl" and goes to extreme measures to do so by chasing him out of the kingdom and attacking him, not caring if Percival was struck by her attack in the process but also showing visible wrath at Percival preventing her from landing a finishing blow on the injured knight.

As a result of her overwhelming power, pride and royal lineage, Gawain developed a high opinion of herself and ego, making her believe she was unbeatable. As noted when Pellegarde defeated and critized both her inexperience and lack of control, she could become pushed to tears at her damaged pride, acting like a spoiled child throwing a temper tantrum and claiming that she is the strongest, only calming down after Tristan reassured her that she was, showing that underneath her facade and vanity, she is a undisciplined child who cries obsessively when things don't go her way or when she is humbled by someone more powerful or experienced than herself.

History
At some point during Percival and his group's journey to the Kingdom of Liones, Tristan had found Gawain and discovered her as the last member of the Four Knights of the Apocalypse. He escorted her back to the castle where, for unknown reasons, Gawain fled the scene after Tristan left to take care of an incident within the city.

At some point after this, Gawain ditched her armor since nobody knew what she looked like underneath, allowing her to blend in with the citizens of Liones wandering the streets.

Chaos in Liones arc
After having been brought to the castle by Tristan, Gawain fled the scene and ditched her armor on the side of the road so nobody could find her. After noticing her absense, Meliodas sends Lancelot to inform Tristan, Percival and the rest of Gawain's disappearance. During their conversation, Lancelot reads Tristan's mind and realizes that Tristan is hiding something to which he reveals that Gawain is a blood relative to their enemy, Arthur Pendragon.

Despite Gawain's connection to their enemy, Lancelot assures the others that Gawain is one of the Four Knights and that they must prevent her from escaping the capital. Tristan's Platoon takes the west gate, Percival and his team take the east gate and Lancelot takes the south gate by himself. Unknown to Tristan's team, Gawain passes by them unnoticed as she walks through the streets while the armor is now being worn by a Holy Knight Apprentice named Tantal, who found it on the side of the road during a walk and wanted to try it on.

Now without her armor, Gawain finds Isolde by herself on a ledge crying. Gawain attempts to comfort her despite her reluctance due to her infatuation with Tristan. However, Isolde notices a fight going on in the east where Pellegarde is fighting against Pelliot and other Holy Knights of Liones. Some resulting debris from the battle, flies right at Isolde, forcing Gawain to use her power to shield her as she declares herself "Master of the Sun".

Annoyed by her atmosphere with Isolde being ruined, Gawain made her way to where Percival was fighting Pellegarde. She instantly snuff out the latter's flames, angering the Black Knight who uses his fire magic to attack her, only for her to effortlessly use her own magic to dispell it instantly. Realizing she has "gold-colored magic", Percival runs up to her asking if her name is Gawain, surprising her that he knew her identity.

Immediately thereafter, Tristan arrives and questions Gawain as to why she disobeyed his instructions to which she claims that she is not one to take orders and then Lancelot arrives in his fox form and transforms back to normal, with Gawain showing little to no surprise at either of their abilites. Realizing their identities, Gawain stands alongside Lancelot, Tristan and Percival as Pellegarde finally recognizes them as the prophecized group: the Four Knights of the Apocalypse.

When everyone discusses what to do with Pellegarde, Gawain says that he must suffer a thousand deaths for calling her a "little girl", which makes Tristan nervous. Percival decides to talk to Pellegarde, giving him the opportunity to kidnap him, leaving the rest trapped in a Perfect Cube. Gawain uses Absolute Cancel to nullify the Perfect Cube, Gawain then calls her sword, Rhitta and teleports to where Pellegarde is, attacking him with her sword not caring about hurting Percival as well, so Pellegarde lets go of him to take the full damage from the attack. However, Percival tackles Gawain before she can hurt Pellegarde.

Gawain beats Percival badly for interfering, leading Tristan to interfere. Tristan berates Gawain for attacking a comrade, but Gawain denies being on the same level as them and that he never intended them to become friends since no one can order her since she is perfect in every way, provoking Tristan to attack her, but the prince refuses to raise his swords against an ally. Gawain simply shoves him out of the way by calling him a wimp and intends to continue attacking Percival who criticizes her for her actions. However, Pellegarde stops her by saying that he will tame a wild horse like her. Warning her that he signed her death sentence, Gawain releases her magical power pretending to incinerate Pellegarde, but he manages to resist her and hit her with his weapon. Gawain then tries to attack him with her sword, but Pellegarde manages to block it and incapacitate her by throwing her into the sky and making her fall hard. Pellegarde criticizes Gawain's inexperience, telling him that she has no control over her own strength and that she is an amateur. This leads Gawain to throw a tantrum of frustration making excuses for her defeat and insisting that she is the strongest despite Percival saying that losing sometimes is no big deal.

Tristan comforts her with compliments and affirming that she will win next time, returning Gawain's air of confidence to her. Gawain says that he will forgive Percival but Percival rejects his apology and the two get into an argument. When Tristan senses demonic magic in the kingdom, Percival shakes Gawain's hand saying he's scared too although she said that she is trembling for the excitement.Gawain teleports the three back to Liones where along with Lancelot confronts a revived Melascula and Galand, who recognize Gawain's magic as the same that Escanor have.

Galand starts attacking the group, punching Percival far away. Then, he faces Gawain delivering a barrage of strikes on her, but Gawain resist his attacks. During the violent battle, Gawain manages to teleport her sword to stab it in Galand's torso and then split it open. When Galand start recovering, Percival sneaks one of his magic golems in, producing a large explosion from within the demon. Gawain then starts chasing after Percival upset that she got caught in the explosion too.

As the two demons fuse into Melagaland, Gawain tries to teleport her sword again, but it fails its target for some reason. Gawain then catches Percival to allow Tristan to attack with Falling Star. As all attacks fails to reach Melagaland, Gawain uses Sunshine Burst to aim at everything around it. When Donny stands to use his Telekinsis to save Percival, Gawain calls him a fool for not listening to her warning of remain at least 100 feets to not get harmed by her magic. Gawain then falls of exhaustion, saying that she has used too much magic in one day.

As Anghalhad and Nasiens comes to help, they are surprised to see that Gawain turned into a small child, deducing that she used her magic to keep that huge body. Donny carries Gawain on his back away from the battle, she wakes up to see Tristan defeat Melagaland and Arthur arriving at the kingdom, apologizing for the presence of her uncle who reproaches her for running away without permission.

Gawain then tries to get Donny to react when he is paralyzed by Arthur's power and then the two are stunned to see how Lancelot manages to overcome Arthur.

The night after the battle, Gawain remembers Arthur terrified.

Current arc
Gawain participates in the meeting in the war room to discuss the situation with Camelot. She remains sitted on Isolde's lap and briefly sets Chion's head on fire after this one makes fun of her. Gawain gets upset when Meliodas names her the Knight of Famine, although she claims that she already speculated that their role "destroying the world" actually meant destroying Camelot. When Anghalhad ask why are they fighting a kingdom that was destroyed 16 years ago, Thetis explains that Camelot was recreated in an alternate dimension by the power of Chaos but are now starting this war because there is a price to pay in order to rebuilt and maintain the new Camelot. To further expose her words, she uses her magic to teleport 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 that Gawain was partially aware. When Percival and Donny ask why Meliodas didn't go to Camelot himself when he could, Meliodas replies that he couldn't because he is a demon, leading Thetis to explain that Camelot is protected by a barrier that prevents any race except humans from entering. As Meliodas says that they entrust everything to the Four Knights of the Apocalypse for being humans and half-humans. When Tristan points out that they're at a dead end by not being able to go to Camelot, Gawain and the rest can't come up with a solution, leading Percival to suggest they just go on an adventure to find one.

Already at night, Gawain appears to Meliodas on the roof of the castle, recriminating him for drinking when he is about to send his son on a life-threatening journey for the destiny of the world. Meliodas is happy to have the opportunity to talk to her and is surprised to see the design of her new clothes, to which Gawain responds furiously for this, wanting to get even with whoever made them. Meliodas says that the designer is gone, but that these clothes are magically processed to fit her size and resist her magic power, leading Gawain to appreciate their usefulness despite their lack of style. Gawain then says if he really expects her to fight Arthur as a Prophesied Knight when she is his niece and has no reason to become allies with Liones. Meliodas says that she still must have her reasons since she is there now, to which Gawain says that she will act as one of them for now but that does not guarantee that she will not end up betraying them.

Meliodas offers her to eat together which Gawain refuses as she is not even acquainted with him, though when Meliodas comments that he made a special pudding for her, Gawain immediately becomes aroused by it given her obsession with pudding. However, after trying Meliodas' pudding, Gawain ends up suffering from food poisoning for a whole day.

Abilities/Equipment
Gawain is described to have "golden magic". This power appears to be Sunshine, the former Grace of Mael and Escanor, as she proclaims herself as the "Master of The Sun". This is later backed up when Chaos Galand felt her power to be just like Escanor's. If she overuses her magical power it will make her pass out from exhaustion.

Gawain also seems to be knowledgeable in spells, as she could use Absolute Cancel to dispel a Perfect Cube.

Abilities

 * Daytime: In a similar way to its previous holder, Gawain undergoes a drastic change while using Sunshine. She turns into a rather tall and well-built woman, surpassing the height of most grown men. In this state, her strength and endurance are enhanced, allowing her to fight against powerful foes like Chaos Galand. However, unlike her predecessor, Gawain turns back to normal if she runs out of magical power.
 * This technique allows Gawain to completely erase any magic or spell.
 * High-level teleportation magic that allows Gawain to appear and disappear at precise locations and teleport groups of people instantaneously.
 * A subsidiary technique that allows to teleport objects to different locations. Gawain used it offensively in conjunction with her sword Rhitta.
 * A subsidiary technique that allows to teleport objects to different locations. Gawain used it offensively in conjunction with her sword Rhitta.

Weapons

 * A sword apparently named after the Divine Axe Rhitta. Like the latter, the sword can be called to Gawain's hands no matter how far apart they are.

Arthur Pendragon
Gawain is the niece of King Arthur. Not much else between the two is known.

Tristan Liones
At first she refused to listen to Tristan but after being defeated and breaking down crying in battle, Tristan was able to cheer her up and regain her pride earning her trust to him.

Percival
Gawain didn't care of him at first due to her prideful nature. When she was battling Chaos Galand she gets angry at him for accidentally catching her in a explosion Percival created to finish off Chaos Galand, making her chase him down out of anger.

Trivia

 * Gawain is named after the character of from Arthurian legends. Her personality in the manga combines both classic depictions of Gawain in the original legends, both as the embodiment of the humane but exemplary knight from various original stories, and as the tragically restless anti-hero from later reworkings and Melory's The Death of Arthur.
 * Gawain is right-handed.
 * Gawain has a sweet-tooth and is a glutton,, asking the Holy Knights of Liones to get barrels of pudding as a reward.