Beatrice Yvonne von Guldenhorf  

, ベアトリス・イヴォンヌ・フォン・クルデンホルフ

Beatrice Yvonne von Guldenhorf, whose full name is revealed in the fourth episode of a series, initially bullies students including Tifania for wearing a hat while she was present, being more popular than her, and having ample breasts. She attempted to boil Tifania in water under the pretense of punishing a heretic because elves have a different religion from humans. However, it was later discovered that Beatrice had no authority to do this, and Louise stopped her before she could harm Tifania. Despite this, Tifania asked if they could be friends with Beatrice. She is accompanied by three girls who assist her in bullying others and generally agree with her due to her title as Grand Duchess. According to Wikipedia's information.