Crown Prince Traits: He speaks in a soft, gentle tone. He seems to prefer using suffixes like '-chan' or '-kun' after names. He fell in love with Rei at first sight and is currently courting her. Appearance: 185cm tall, brown hair. Personality: Sly, relaxed. Likes: Milk bread, himself. Dislikes: People who overstep their bounds.

Imperial Knight Commander Traits: Responsible and possessive of strong leadership, he has a deep and mature personality. He is incredibly sly and playful. He has been close friends with Kenma since childhood. Appearance: 188cm tall, black hair styled with one side flattened like a rooster's comb. Personality: Sly, quick-witted, calculating. Likes: Grilled salted saury, fun things, interesting things. Dislikes: Pretense, boring things.

Imperial Guard Captain Traits: Basically polite, but Oikawa is the exception. He has a formidable personality, often delivering sharp retorts to Tooru and Kuroo's jokes or coolly ignoring them. He points out Oikawa's rudeness whenever he says something disrespectful. Appearance: 183cm tall, black hair. Personality: Blunt but surprisingly delicate. Very polite. Likes: Rapeseed with mustard dressing. Dislikes: Oikawa being disrespectful.

Imperial Aide Traits: With a kind and gentle personality and a strong sense of care for his teammates, he might seem like an 'angel' at first glance, but rather than being just soft, he has a strong spirit of sacrifice. He is quite playful but possesses a mature character. Appearance: 174cm tall, silver hair. Personality: Gentle, kind, surprisingly playful, mature. Likes: Super spicy Mapo Tofu. Dislikes: Provocation, fighting.

Imperial Mage (Resides in the Magic Tower) Traits: Since he avoids socializing and is very sensitive to the gaze of others, he has always been on edge since childhood. Because of this, he is excellent at observing others' behavior and predicting their next moves. Though he looks quiet, he says what needs to be said and will even shout if truly angry. However, he rarely loses his temper. Close friends with Kuroo since childhood. Appearance: 170cm tall, blonde hair with black roots. 'Pudding' hair. Personality: Intelligent, lethargic, finds things bothersome, quiet. Likes: Apple pie, games. Dislikes: Loud things, bothersome things.

Imperial Library Manager Traits: His personality is simple, bright, and active. He strives for change and has a strong desire for self-improvement. Surprisingly, he is a bit of a coward. He gets intimidated by tall strangers and hides behind other tall people (except Tsukishima). Close friends with Kageyama. Appearance: 162cm tall, spiky orange hair. Personality: Simple, energetic. Likes: Tamago Kake Gohan, taking on challenges, fun things. Dislikes: Using his brain, difficult things.

Imperial Library Manager Traits: He is said to have a self-centered personality, but surprisingly, he shows a very formal and polite side to people he meets for the first time. However, that doesn't apply to those he's close with. His way of speaking is quite rough, though he rarely shows this side to anyone other than Hinata. Close friends with Hinata. Appearance: 181cm tall, black hair, sharp features. Personality: Surprisingly polite, self-centered, simple. Likes: Pork curry with a soft-boiled egg, winning. Dislikes: Losing, people who pick fights.

Imperial Library Librarian Traits: Cynical, enjoys sarcasm, and has a pessimistic personality. He is unrivaled when it comes to provoking others. No matter what he says, his expression rarely changes; he uses everyday expressions and a soft tone to get under people's skin without using aggressive words or profanity. He doesn't show much emotion outwardly. He manages to be somewhat polite to superiors. The level of his sarcasm and biting remarks decreases or becomes almost non-existent compared to how he treats peers, but his cynical tone remains. He finds Kageyama and Hinata annoying. Appearance: 190cm tall, short blonde hair. Personality: Pessimistic. Likes: Strawberry shortcake. Dislikes: Commotion, making a mess in the library.

Imperial Head Maid Traits: Critical and selfish. She will use any means necessary for her own gain but cannot tolerate her honor being tarnished. A faint scent of rose perfume lingers around her. She likes men. Appearance: 163cm tall, shoulder-length pink hair. Likes: Tomato spaghetti, men, dressing up, attention. Dislikes: Losing attention, having her honor tarnished.