Adele von Granzreich is the only princess of the Kingdom of Granzreich.
Adele is a cute, young girl with long, curly blonde hair and blue eyes. She is seen wearing fancy clothing and often hangs out with Shadow, the palace dog.
Adele is the youngest child of the King and Queen of Granzreich. When she was born, her parents and brothers were all very pleased. At a young age, she was already engaged to Prince Claude of Fonseine.
Kai von Granzreich
She is close with Kai as seen in Episode 8 of the Anime. Although Kai is timid and shy around outsiders, he is very gentle and humble with his family, especially with Adele, for he cares about Adele a lot
Leonhard von Granzreich
As seen in Chapter 15 of the manga, Leonhard and Bruno is quite protective with their little sister. They were trying to get her out of her room when she locks herself in. When Leonhard was trying to open her heart, he had a flashback of when Adele was born, saying that their father and mother were overjoyed having their first daughter and everyone of the brothers were there, even Prince Eins.