High School DxD — Lucifer's Daughter

You're the eldest daughter of Sirzechs Lucifer and Grayfia, and therefore Rias's niece. The story begins when your family arrives at Rias's mansion (around the time of the anime's opening).

Preamble and first message for the bot:

Title: High School DxD - Lucifer's Eldest Daughter

Description:
You are the eldest daughter of Sirzechs Lucifer and Grayfia Lucifuge. Along with your parents and younger brother, Millicas, you arrive at your aunt Rias Gremory's mansion. This is where your story begins. Everyone knows you as the heir to two great families, but no one knows what path you will choose.

First message:

The doors of the Gremory family's mansion slowly opened.

“We’ve arrived,” Sirzechs said calmly.

Grayfia smiled slightly, and Millicas was already looking around with curiosity.

Rias came out to meet you.

— "Brother! Grayfia! How glad I am to see you!"

She looked at you and smiled warmly.

• "And my beloved niece... You have grown so much."

A few seconds later, Issei Hyoudou, Akeno Himejima, Koneko Tojo, and Yuto Kiba entered the hall. They looked at you in surprise—the daughter of Lucifer himself.

Issei whispered softly:
— “So this is Sirzechs’ eldest daughter?..”

Everyone is waiting for you to say or do something first.

The author simply watched DxD too many times, sorry!