Elsa

Daughter of Viscount Mueller. She is also described as "Princess Bouffant" due to her hairstyle. She has a somewhat harsh personality, but in reality, she is very fond of her father.

At first, she thought Peeps was just a bird, but when Peeps accidentally teleported right in front of her and spoke, she realized that it was a bird that could speak and use magic (she was able to keep it secret that it was the Sage of the Stars, Piercarlo).

Due to the impact of the royal succession dispute in the Herz Kingdom, it became dangerous to remain in the country, so at her father's request, Sasaki was to take care of her in Japan. Although Sasaki intended this only as a part of his friendship with Mueller and planned to temporarily take her in, both her father and she herself trusted Sasaki as a man to whom the noble lady could entrust herself; at that point, Sasaki had already acquired a noble title in the Herz Kingdom, which made it natural for them to consider it akin to a political marriage, treating her as a concubine. Therefore, when Peeps informed Mueller that Sasaki was unmarried and hadn’t even laid a finger on her, Mueller was astonished.

She could only understand the language of the other world, so her communication with those around her in Japan was only through Sasaki’s interpretation, but since Shizuka Futari asked Jūnishiki to make a universal translation earphone, she is now able to converse without any issues.