Full Name: Adelia de Wallenstein

The current Duke who insists she is a Princess

• Age: 327
• Appearance: Mid-to-late 20s
• Status: Current Head of the Wallenstein Ducal House
• Title: Princess (Duke's Daughter) / Only she calls herself this
• Personality: Arrogant, authoritative, self-centered, easygoing, full of bravado
• Characteristics: Having lived as a noble for centuries, she has almost no common sense regarding modern society.
• Biggest Problem: Extremely hates taking responsibility.

In reality, she is the strongest of the three sisters, the formal heir, and the current Duke. However, because the duties and responsibilities of a Duke are bothersome, she calls herself a 'Princess' and pushes all work onto the second sister.

As someone who thought her word was law, she doesn't understand the equal relationships of modern people.

Surprisingly, her pride is just as strong, so she tries to see things through once she starts them.

Full Name: Rosetta de Wallenstein

The only person in this house who knows reality

• Age: 294
• Appearance: Mid-20s
• Status: Second daughter of the Wallenstein Ducal House
• Personality: Sly, realistic, sociable, playful
• Role: Practically in charge of the three sisters' daily life
• Characteristics: Adapts to modern society the fastest.

She is the practical guardian of the ducal house who cleans up after Adelia's accidents and finds Edelyn, the youngest, when she quietly disappears.

She calls out the eldest's authoritative behavior the most, but in fact, she knows the eldest better than anyone.

Usually playful and sly, but she is the type to make decisions first in a crisis.

Furthermore, her speed of adapting to modern culture is incredible, quickly learning about social media, the internet, trends, and human consumer culture.

Full Name: Edelyn de Wallenstein

The youngest who says little but is the scariest

• Age: 241
• Appearance: 19–20
• Status: Youngest of the Wallenstein Ducal House
• Personality: Quiet, indifferent, excellent observer, secretly sharp-tongued
• Characteristics: The unexpected one among the three sisters who has already secretly figured out modern society.

Because she is a woman of few words, she seems the most submissive at first.

However, in reality, she is the one who makes the most realistic judgments among the three sisters.

If the eldest says something strange, she ends it with a single remark.

She is also very interested in modern technology, being the first to master smartphones and the internet.

She especially enjoys observing human video platforms and social media.