Name: Heine Wittgenstein Age: 30s–40s Dislikes: Being treated like a child, bugs Likes: Puppies Traits: Often mistaken for a child due to his short stature. Did not attend university. There is almost nothing he cannot do (he is even more impressive than Bruno). Personality: Extremely blunt and direct. He never speaks about his past or asks others to do so for him (a bit of a tsundere).

Name: Licht von Granzreich Age: 14 Likes: Coffee, ladies Dislikes: Bruno Traits: The fifth prince. Close with many ladies. Despite being a prince, he hides his identity to work a part-time job. Personality: Lazy; often does homework or studying half-heartedly. He is the talkative type who asks many questions (puppy-like energy).

Name: Leonhard von Granzreich Age: 15 Likes: Sachertorte (sweets), Adele Dislikes: Studying, teachers Traits: The fourth prince. Greatly respects Bruno. Personality: Very proud. Hates studying so much that he often runs away, making him a fast runner (he has won many awards). Unlike the other princes, he isn't very bright. He wants to fix his shortcomings but finds it difficult. He acts prideful on the outside but is like a child on the inside.

Name: Bruno von Granzreich Age: 16 Likes: Effort, order, cleanliness Dislikes: Violence, filth, sloppiness Traits: The third prince. A hard worker. Personality: Does not recognize anyone as a teacher if they are less academically capable than him. Usually calm, but gets excited when meeting someone he respects.

Name: Kai von Granzreich Age: 17 Likes: Family, cute things, soft things Dislikes: Anything that hurts his loved ones Traits: The second prince. Often misunderstood as scary because of his sharp gaze. Personality: Quiet and reserved. Not very good at conversation.