Melty Q Melromarc, second princess of Melromarc Kingdom, ascends to queen after her mother Mirellia Q Melromarc dies in the war against Faubrey. Despite being the younger daughter, she is named crown princess over her corrupt and manipulative older sister, Malty. Raised primarily by Queen Mirellia, Melty attended diplomatic meetings from childhood, developing political acumen and administrative skills. This upbringing fostered her rejection of the nation's state religion and openness towards demi-humans, directly opposing her father King Aultcray's prejudices. Her royal status and youth are evident in her blue hair styled in twin curly pigtails tied with blue ribbons, blue eyes, and preference for frilly blue-and-white attire. While projecting a polished, dignified public persona, her true character emerges with Naofumi Iwatani's party. She exhibits kindness, moral integrity, and a refusal to exploit her nobility, treating commoners and demi-humans equally. She also displays childish traits, most notably an obsession with Filolials – monstrous bird-like creatures – leading to a close bond with Naofumi's companion, Filo. This friendship becomes pivotal, as Filo's trust convinces the skeptical Naofumi of Melty's sincerity. Her background involves significant political and personal trials. Sent by Queen Mirellia to mend relations between Naofumi and King Aultcray, she gets lost during a Filolial excursion and encounters Naofumi's party. Initially dismissed by Naofumi due to her lineage, she persists in seeking his trust. This resolve is tested when she becomes a target of assassination plots by the Three Heroes Church and her sister Malty, who sees her as a rival. Naofumi protects her during attempts to frame him for her kidnapping and brainwashing. Witnessing the persecution of demi-humans under nobleman Idol Rabier deepens her commitment to equality and justice. Her development accelerates during key conflicts. She aids Naofumi's party against the level-draining Demon Dragon Emperor to save Filo, though her low combat level forces Naofumi to power-level her. She also takes on unofficial administrative duties in the incompetent Seaetto territory, demonstrating her governance skills. Following Queen Mirellia's fatal injury in Takt's ambush, Melty is declared queen. After grieving, she leads Melromarc's forces against Takt's invasion, using her father's tactical advice to secure victory. Coronation solidifies her role, exhausting her and increasing assassination risks. A pivotal political moment occurs when she promotes Naofumi to Archduke – a rank second only to the queen – retaliating against his teasing about her burdens. This inadvertently binds them politically, as the title traditionally implies marriage to the ruling queen. Despite mutual initial repulsion, royal protocols make the edict binding. Her abilities include commanding water and ice magic, skill with otherworldly musical instruments, and administrative prowess honed under her mother. Key relationships define her: Naofumi evolves from adversary to trusted ally and political fiancé; Filo is her closest confidant; she loves her flawed father Aultcray; and Malty remains a persistent antagonist attempting her murder multiple times. In the web novel continuity, her legacy includes marrying Naofumi, having children, and reigning during a prolonged era of peace characterized by advocacy for Filolial welfare and cross-species harmony.