Merlin

Merlin is a member of the Seven Deadly Sins and is known as the Boar's Sin of Gluttony. She is regarded as the greatest mage in Britannia. Her Sacred Treasure is the Morning Star Aldan, a floating orb she can summon at will and often uses in conjunction with her spells and her inherent power Infinity. The name "Merlin" is actually an alias as her true name is unpronounceable to humans. Ten years ago, Merlin was wearing a full set of armor with a unique helm that resembled a beetle, like the rest of her fellow Seven Deadly Sins. This armor set had a long dress and she wore high heeled boots. Merlin's wanted poster depicts her as a young woman with long dark-colored hair. Her Seven Deadly Sins tattoo is located at the left side of her neck and is colored red, hence her nickname as the "Crimson Pig". Ten years afterwards, Merlin was first seen wearing a long violet cloak that covered her whole body and her face, making her sex ambiguous. When the cloak was ripped apart, Merlin was shown to look very similar to her appearance on her wanted poster. She is seen as a slim, attractive, tall woman with three beauty marks below her right eye (though after her reappearance after Hendrickson's defeat, she appears to only have a single, lower-placed, larger beauty mark). Her outfit consists of a highly revealing and open fur collared long coat, with heart shaped buttons, short shorts with a heart on it, and thigh high boots. Merlin's hair is at shoulder length and black.

After having her magic seal spell reflected back by Chandler's Full Counter, it is revealed that her true form is that of a childish form of herself seen thus far disguised by magic. In this form, she is described as an adorable child by Chandler with long black hair reaching her mid back. Prior to the Seven Deadly Sins' supposed betrayal, Merlin demonstrates a playful nature, telling her teammates that their meeting with the Great Holy Knight might turn out to be a scolding from their superior for destroying the Great Druid Altar. Merlin is also apologetic, in asking for her captain's forgiveness for knocking him out. She enjoys mocking and challenging others, teasing her apprentice Vivian for losing herself in rage again. Merlin tends to use anyone as a magical guinea pig to test out new techniques she learned so long as the results are good (as Meliodas had noted).  Merlin is said to be the greatest magician in all of Britannia, she was able to defeat some of the greatest Holy Knights in Liones, easily overpowered her former student Vivian, the current most prominent mage of Liones, and even defeat Grayroad, one of the Ten Commandments. In addition to being extremely knowledgeable of magic and spells, Merlin has also demonstrated the ability to levitate and is able to cast illusions, having produced a large powerful mirage army that tricked even the Great Holy Knights. Though she was able to cure Bartra using her magic item Cure Angel, Merlin is unable to use true healing magic as only the Druids from the eastern forest can perform such a spell. She has studied the demon realm and demonic magic for a very long time and as such is in possession of spells and objects originating from that realm.

After receiving the blessings of both the Demon King and the Supreme Deity, Merlin gained immunity to the brainwashing and possession abilities of the Goddess Clan, as well as resistance against magic attacks and dark curses, including the Commandments, as she remained unscathed by Vivian's ferocious wind attacks, with only her cloak ripped apart. The simple mention of her birthplace and her true name is enough to frighten two members of the Ten Commandments and send one of them fleeing for their life. Later another member of the Ten Commandments praised her for being able to escape from his attack.  Infinity: An ability that allows Merlin to stop the time of her spells, causing them to last for eternity. The ability is so powerful that many label it as 'cheating'. Absolute Cancel: By placing her hands over a spell, Merlin is able to completely erase it from existence. However, if the particularity of the magic is being sufficiently powerful, it may be difficult to erase completely, instead being temporarily suspended. Magic Cancel: A technique that allows Merlin to cancel any magic that has been cast on an individual. It was shown to cancel the effects of one of her own magical items. Location: A power that allows Merlin to locate any item or person. She can extend its reach to cover an area of approximately the size of a city. Power Amplify: A spell that allows Merlin to amplify the magic of her allies, making their techniques considerably more powerful. Perfect Cube: A spell that denies entry to anyone but the caster. Originating from the demon world, the spell surrounds a specified area and reflects all attacks, whether strong or weak, back at the opponent. Shunkan Ido: High-level teleportation magic that allows Merlin to appear and disappear at precise locations and teleport groups of people instantaneously. The spell effect radius of Merlin's teleportation is several miles wide. Her teleportation magic was shown to be much faster than that of the Liones Kingdom's greatest magician. Apport; literally meaning "Object Transition"」: A subsidiary teleportation technique that allows Merlin to summon various objects, such as clothes and weapons, to herself and her allies. Aqua Dress; literally meaning "Water Dress"」: A spell that creates clothes made of water. By refracting the light in the water, Merlin is able to hide the most "important" parts. Wave Dragon: A spell that allows Merlin to call many dragons made of water. Fire Storm: A spell that allows Merlin to attack the opponent with a powerful blast of fire. Exterminate Ray; literally meaning "Light of Annihilation"」: A spell where Merlin fires a disintegration beam, incinerating everything in the line of fire. Endless Whirl: A spell with which Merlin creates a vortex of wind with an incredible destructive power, sucking their objectives towards its center.  Curse Engage: A spell with which Merlin creates a contract between two beings to control one of them. By placing a ring on the hand of the victim, this is subject to the spell that causes excruciating pain in their body every time they try to use magic against the other person or the other person saying the incantation "Remada". Each time the spell is used, the person affected will be covered by brands that are becoming larger and once these brands cover their entire body, the affected person will die. The victim of the spell is unable to ever remove the ring. Shock Stinger: A spell with which Merlin throws a lightning bolt at the enemy causing a great impact on his body. Magic Seal: A technique that seals away the magic of the objetive.