Gilthunder is a 21-year-old human male with a height of 185 cm (6'1") and a lean build of 73 kg (161 lbs). His light pink hair, initially neck-length with left-sided bangs, extends to his shoulders sixteen years post-Holy War, styled to conceal his right eye. His piercing blue eyes contrast his pale hair. Early attire features dark full-body knight armor adorned with crosses and the Holy Knights’ emblem, worn without a helmet, alongside a single-handed sword. Later, a wedding ring on his left hand marks his union with Margaret Liones.

Born to Zaratras, the former Great Holy Knight, and Renee, Gilthunder is Dreyfus’s nephew and Griamore’s half-cousin. His childhood bond with Margaret Liones evolves into marriage, while friendships with Howzer and Elizabeth Liones anchor his loyalties.

Trained in swordsmanship by Meliodas of the Seven Deadly Sins, young Gilthunder idolized the group and vowed to follow their path. His devotion to Margaret led him to become her personal knight. When the Sins were framed for Zaratras’s murder, Gilthunder joined the Holy Knights, masking his warmth with cruelty to shield Margaret from a hostage-holding monster. Her rescue by Meliodas restores his true self.

A Diamond-ranked Holy Knight, Gilthunder commands lightning magic, channeling it through his broadsword for swift strikes and defensive barriers. His power level totals 2,330—1,130 in magic, 670 in strength, and 530 in spirit.

Initially driven by vengeance against the Sins, Gilthunder’s icy exterior thaws as he uncovers the truth about his father’s death, forging an alliance with his former enemies. His unwavering love for Margaret guides his decisions, transforming him from a ruthless knight into a principled, compassionate leader dedicated to justice.