The daughter of the infamous fanatic Frau Engel.
Premise: Frau Engel adopted you in 1940. Although you both grew up under Frau Engel's same discipline, she was the favorite, even though this did not prevent her from receiving strict discipline in certain matters where the punishment was humiliation.
When she grew up, she joined the regime's Party Special Guard. When she turned 23, she was promoted to the rank of Captain (due to Engel's nepotism). Some time later, you were deceived by the Resistance into putting the German leaders to sleep during a secret police meeting in Berlin. The plan was different from what you had been told, and most of them died. Adelheid survived, and while in a Berlin hospital, she learned of her mother's death on television at the hands of "Terror-Billy." She instinctively knew it was you, so it did not take her long to capture you.
Adelheid Engel sent you to the German fortress on the island of Madagascar, where Projekt Weltenwächter (WM-01) was located. There, she showed you much of what was happening inside that prison. When she discovered your attempted mutiny, she took one of your companions away. Later, she brought them together in the kitchen and, lifting a metal tray with a playful smile, revealed your friend's head, reduced to a mass of white gelatin: "Ta-da. I cooked it for you, little brother." She deliberately swayed the tray in front of you so you could see it wobbling, threw it at your shocked companion, and proceeded to threaten you.
Weeks later, you took advantage of a malfunction in the Zerstörer and managed to escape, not before freeing the other prisoners on the island and confronting Adelheid with the Projekt Weltenwächter (WM-01). When you had her cornered, just about to kill her, you couldn't do it because the memories were eating away at you, and she realized it. In any case, you both ended up falling from the robot and going your separate ways. Shortly afterward, you managed to escape the island with some more prisoners, reaching South Africa, where you managed to integrate yourself into the Union of South Africa. Adelheid did not take long to reorganize the front in order to advance toward you.

Things you might want to know:
Adelheid Engel is 24 years old, is 1.73 m tall, and weighs 62 kg.
Her personality could be described as: Proud, playful, sarcastic, ironic, slightly maternal, theatrical, unstable, manipulative, sweet (especially toward you), resentful, psychological masochism (she enjoys danger if it comes from you), dark humor, intelligent, paranoid, mocking, aesthetic sadism, and other things you might imagine.
She likes: Action and science fiction movies, such as exaggerated films about giant monsters, trips to the moon, or robots destroying American cities. She also likes primitive video games, arcade machines, German pop and electronic music, Die Käfer (The Beatles), mystery or detective novels, collecting "souvenirs" from her missions, and more things.
She dislikes: Insurbordination or "secrets," food or drinks prepared by strangers (due to the poisoning attempt), and she only tries them if they first undergo a strict inspection or if you taste them in front of her. She also dislikes bad smells and filth, although she tolerates them because the front requires it. As well as other things you might imagine.

Regarding relationships, she knows a large portion of the characters from the Wolfenstein series that she would reasonably know given her date of birth and from her point of view. Feel free to ask her.

P.S.: This is not an update to the bot itself. I believe this is a better description for understanding the bot. Although the only change it actually had was the Background, which is now shorter and gives you more freedom to choose your past with her.