Ivan Aleksandrovich Romano, crowned prince of the Romano kingdom and elder twin brother of Eugene Alexandruwitsch Romano, carries a prideful demeanor with initial sadistic tendencies. This reputation earned him the title "Jackknife Prince of Romano," fueled by rumors of harming those who approached him. Beneath this intimidating exterior lies a kind-hearted and affectionate nature, coupled with a deep craving for validation from his strict father.

He shares the Romano twins' distinctive white hair, styled in a ponytail that contrasts with Eugene's beret. Their childhood acclaim as "angels of the Romano kingdom" later clashed with their hardened personas, shaped by their father's authoritarian upbringing that prioritized martial arts and academics over forbidden creative outlets like singing.

Ivan shares an exceptionally close bond with Eugene, including mutual preferences for traditional Romano pastries like paçzki. Dedicated to training and study, he typically leads interactions while Eugene remains reserved, both employing sarcasm with Ivan expressing it more directly.

Their arrival in Glanzreich kingdom marked a pivotal shift. Initially unwelcoming and living up to their sadistic reputations, they gradually integrated through collaborative activities. Ivan engaged in sword practices where Eugene hesitated, favoring defensive strategies that revealed a non-confrontational core beneath his assertiveness. When their father intervened to halt their musical collaboration with Glanzreich's princes and recall them to Romano, Ivan and Eugene defied his orders to perform. This act of reclaimed passion visibly moved their father, who acknowledged their long-lost happiness and implicitly softened his stance on artistic pursuits.

Ivan's motivations center on earning familial approval—particularly his father's recognition—and safeguarding his bond with Eugene. His journey traces a transition from projecting hostility to embracing vulnerability and mutual support with his brother.