Movie
Description
Kai von Glanzreich, the second prince of Glanzreich, stands tall at 185 cm with a broad-shouldered, imposing physique, renowned as the strongest among his siblings. His light ash-blond hair is short and swept over his left eye, complementing sharp blue eyes that often create a mistaken impression of glaring, contributing to an intimidating reputation. Anime adaptations depict his hair as a whiter platinum blond. He frequently wears white gloves.

Belying his fearsome exterior, he possesses a gentle, kindhearted, and calm nature. He struggles significantly with verbal communication, frequently causing misunderstandings and unnecessary fear among castle staff. He harbors a deep affection for soft, fluffy objects and living creatures, often attracting animals and crafting flower rings for his sister and his tutor, Heine Wittgenstein. His interests include drawing, though he lacks artistic skill, producing abstract works bearing little resemblance to their subjects. He demonstrates high intelligence with academic scores averaging 87 and possesses surprisingly quick reflexes, enabling him to intercept thieves or chase moving carriages. However, he exhibits laziness in daily routines, preferring naps in gardens, and shows denseness in romantic matters, particularly regarding his fiancée Beatrix von Lothringen's affections. He acts as a mediator during conflicts among his siblings, driven by a strong desire for family harmony; his innocent, pure-hearted nature makes it difficult for others to oppose his interventions.

His background includes an early engagement to his cousin, Beatrix. At age 15, he enrolled in a military academy per royal tradition. When he discovered his younger brother Bruno was being bullied by another student, Ralf von Fuchs, Kai reacted protectively, assaulting Fuchs in a rage. This incident resulted in both their suspensions and the permanent withdrawal of Kai and Bruno from the academy, further solidifying his reputation for violence, though it stemmed from loyalty to his family.

Initially isolated due to his appearance and speech difficulties, the arrival of royal tutor Heine Wittgenstein marked a turning point. Heine became the first authority figure to address him without fear and recognize his gentle nature, fostering a deep fondness in Kai, who perceives Heine as small and cute. Encouraged by Heine’s advice to take initiative in changing others' perceptions, Kai gradually works to overcome his communication barriers. His later return to military training signifies growth, culminating in forming his first friendship—a milestone highlighting his increasing social confidence. His journey reflects steady progression from isolation to greater engagement, underpinned by persistent kindness and protective loyalty.

His relationships emphasize strong familial loyalty; he prioritizes his siblings' well-being, exemplified by his defense of Bruno. He shares particular camaraderie with his youngest brother, Licht von Glanzreich, as both comfortably engage in unconventional royal activities like informal picnics or eating without utensils. His bond with Heine remains significant, rooted in mutual respect and Heine’s affirmation of his inherent gentleness.