Bruno von Granzreich is the third prince of the Kingdom of Granzreich.
Bruno is a young man with short, brown hair and wears glasses. Like the rest of his family, he has blue eyes. He's been noted that he looks like his mother.
Bruno is the most serious of the brothers, and the most studious. Ever since he was little, he excelled at all things academics and is always striving to improve himself so that others would notice him. He admits he in fact is jealous of other's abilities and was not a genius but worked harder than everyone in order to receive praise. He also has a tendency to overthink and obsess over things. Towards people he admires, like Heine and Doctor Dmitri, he's extremely deferential and respectful. In Heine's case, he refers to him as Master and obsesses over him, wishing to be referred to as his apprentice and having an almost unhealthy desire to learn more about him. He's mindful of his duties as a prince, and is the one among his brothers to remind everyone of the rules. Although he and Licht are often at odds because of their clashing personalities, they care about each other.
As a child, Bruno was already excelling academically thanks to his hard work. However, despite all the praise he received from others, he was never satisfied because everyone saw his older brother Eins as a genius and the definite heir to the throne. This pushed him to study harder.
A year before the story started, he and Kai were enrolled at military academy as part of royal tradition. Due to an incident, they had to leave.
- He prefers dogs over cats.
- He spends his day usually reading and studying.
- His least favorite food is Liver.
- He is said to hold resemblance with his mother.