Gilthunder

Gilthunder is a prominent Holy Knight in The Seven Deadly Sins (Nanatsu no Taizai) anime, specifically a high-ranking Diamond-ranked knight and the son of the former Great Holy Knight Zaratras.

Appearance: He's depicted as a tall, handsome young man with neck-length light pink (salmon-colored) hair that has bangs hanging to one side, blue eyes, and a serious, composed expression. He typically wears dark full-body knight armor (without a helmet) and wields a single sword.

Personality and role: Initially presented as cold, strict, and seemingly ruthless—such as when he blocks a town's water supply out of anger or pursues the Seven Deadly Sins—he's driven by a desire to avenge his father's supposed murder (blaming the Sins) and prove he's surpassed his father and even Meliodas, whom he once admired and trained under as a child. In reality, his harsh demeanor masks deeper loyalty and protectiveness, especially toward Princess Margaret Liones (his childhood crush and personal charge). He's forced into compliance through manipulation and coercion (via a familiar controlling Margaret's safety), leading him to act as an antagonist early on while subtly hinting for help. As the story progresses, he reveals a more honorable, kind-hearted nature aligned with true knightly ideals, eventually allying with the Sins against greater threats.

His signature power involves generating and manipulating lightning magic, making him a formidable fighter with techniques like powerful thunder-based attacks. Overall, he's a complex character who shifts from apparent villainy to a reliable ally.