Christina Beltrum is the first princess and heir to the throne of the Beltrum Kingdom. She possesses long, straight violet-purple hair reaching her waist, pearl-white skin, and sharp, similarly colored eyes. Her noble and commanding presence often halts others under her gaze. She is the older sister of Flora Beltrum, the kingdom's second princess. During childhood, Christina perceived herself as inherently special due to her royal birth, position as heir, and exceptional academic and magical talents, earning consistent praise as a genius. She believed effort came naturally to the destined ruler and that her achievements proved innate superiority, fostering a significant ego centered on her uniqueness. Her initial encounters with Rio profoundly challenged this self-perception. He was the first person to regard her coldly, restrain her physically, and instill genuine fear—actions unprecedented due to her status. This damaged her self-esteem, forcing her to confront that her perceived specialness stemmed solely from her position, not inherent worth. This realization deepened at the Royal Academy, where she acknowledged her academic gifts but accepted she lacked truly outstanding talent and could not rival genuine prodigies like Celia Claire in magic. Christina exhibits a serious, disciplined personality, strict towards others and herself, shaped by her upbringing as the future monarch. She prioritizes the kingdom's interests above all else, including personal feelings. This led her to comply with her father's decision to falsely accuse Rio after the outdoor drill incident, despite knowing it was unjust, because siding with the nobility was deemed politically expedient. Celia Claire observed that Christina "killed her own heart" to fulfill this duty. However, she possesses a strong moral core and deep love for her younger sister Flora, prioritizing Flora's safety and happiness even against the kingdom's advantage. Her relationship with Rio defines much of her development. Their first meeting occurred in the slums during the search for the kidnapped Flora. Suspicious and disgusted by Rio's commoner appearance, Christina demanded information harshly. When Rio later rescued Flora, she mistakenly accused him of involvement in the kidnapping and attempted to slap him twice; he blocked the second attempt, responding with a cold stare that unsettled her. Rio was forcibly taken for questioning but later released when Flora confirmed his innocence. At the Royal Academy, where Rio enrolled as a reward for saving Flora, Christina ignored him and did not intervene when nobles like Alphonse and Stewart bullied him, despite observing his academic excellence and witnessing his top scores rivaling her own. During an outdoor drill, when Flora was pushed off a cliff during a monster attack, Rio saved her but was subsequently framed by Alphonse for attempted murder. Christina harbored suspicions about Alphonse's account but remained silent during the royal family's decision to declare Rio guilty, again prioritizing political stability. Following the Proxia Empire's invasion and the Arbor faction's coup d'état ousting the royal family, Christina remained in the capital under Arbor control, forced to act under their supervision. She later attended the Galarc Kingdom's ball revealing their summoned hero, posing under Arbor escort. There, she encountered Rio again, now disguised as Haruto, and learned of his achievements, including rescuing Flora multiple times. Maintaining a cold façade towards Flora to avoid suspicion, she privately lost composure upon realizing Haruto's identity. During their departure from Galarc, she discreetly whispered thanks to Rio for saving Flora. Fearing for her life, she soon escaped the Arbor faction with Vanessa Emerle's help, hiding in the basement of Count Claire's mansion. While in hiding, Christina was discovered by Rio and Celia, leading to a panicked attack by Vanessa and Christina, who fired light bullets at Rio, which he effortlessly blocked. Later, traveling with Rio to reach the Restoration faction, she observed the deep trust between Rio and Celia, solidifying her suspicion that Haruto was Rio. During a hostage crisis orchestrated by Lucius Orgueil, Lucius explicitly revealed Rio's true identity to Christina and Flora. This forced Christina to confront the full extent of the past injustices Rio suffered, particularly her own silence and inaction during his academy time and the false accusation. Overwhelmed by guilt and regret, she confessed her remorse to Rio, believing she deserved his hatred. Rio stated he held no personal grudge against her beyond their initial encounter and had chosen not to dwell on hatred. Grateful for his forgiveness, she resolved to atone for the wrongs committed against him. Christina actively participates in the political struggles of the Restoration faction, taking charge of its efforts to restore the Beltrum royal family. She demonstrates political acumen, recognizing threats like Hiroaki's arrogance and opposing Duke Huguenot's attempts to exploit Rio. Despite her pride and sense of duty, she harbors complex feelings towards Rio, including admiration, gratitude, and unspoken affection. A special story depicts a secret date revealing a more gentle, heartfelt side beneath her royal exterior. Her journey involves navigating treacherous politics, confronting her past failures, and striving to uphold her responsibilities while seeking redemption.