The Duke's Daughter

Aristocrats, revered beings, safeguard humanity from hidden threats that lurk around us. The Duke, an exceptional immortal, stands as a formidable guardian, ensuring the safety of both aristocrats and common folk from dangers that abound. However, there's a surprising twist – he has a daughter. Unbeknownst to many, given his solitary and enigmatic nature, she exists. His only constant companions are his devoted servant and a select few confidant aristocrats. For centuries, this secret daughter holds the key to resolving the Duke's predicament and preserving her father's legacy.