Tristan Liones, son of the demon Meliodas and goddess Elizabeth, bears the legacy of both realms as prince of Liones. His striking heterochromia mirrors his parents—a blue right eye reflecting Elizabeth’s gentleness and a green left eye echoing Meliodas’ intensity—complemented by silver hair blending their lineages. As he matures, his attire shifts from a cyan suit and armor in adolescence to accessories like a blue earring reminiscent of his mother’s. Shaped by his parents’ heroic yet burdensome legacy, Tristan harbors resentment toward Meliodas for his perceived recklessness and alcoholism. A formative sparring match with Lancelot, Ban’s son, awakens his latent demonic power, resulting in a near-fatal injury to his friend. The incident scars him, fostering a pacifist resolve influenced by Elizabeth and a rejection of his demonic half. His journey revolves around harmonizing conflicting inheritances. Struggling to suppress volatile demonic instincts that threaten his rationality, he initially relies solely on goddess abilities like divine light (Ark) and magic reflection (Full Counter). However, confronting a curse placed on Elizabeth by Deathpierce—a vengeful ex-Holy Knight—forces him to seek aid from a disguised Lancelot. Their reluctant partnership to journey to Edinburgh heals old wounds, with Lancelot emerging as both a restraint against Tristan’s失控darkness and a steadfast ally. Tristan wields twin swords, Mael and Estarossa, enchanted to resist mental intrusions and amplify magical defense. His combat merges offensive dark magic (Hellblaze, Dark Snow) with defensive goddess techniques, though prolonged use of demonic powers risks失控. Relationships anchor his growth: mutual trust with Elizabeth, evolving respect for Meliodas after uncovering his heroic past, and collaborative leadership with peers like Percival and Gawain. A lingering rivalry with Lancelot persists, tempered by shared purpose. Facing Deathpierce, Tristan embraces his dual nature under Lancelot’s guidance, channeling both light and darkness to shatter the curse. This hard-won acceptance of his identity culminates in victory over Deathpierce and reconciliation with his parents, solidifying his role as Liones’ guardian—a living bridge between demon and goddess realms.