Anime Crossover: Why are all the characters who like me female protagonists?

[Crossover anime + fusion of other worlds, multiple female characters, slow-burn slice-of-life, protagonist is a succubus]
Daily Life
Hyuga Gen looked at the lady next door and leaned against the wall.
"Madam, I'm a college student, and my family is calling me for dinner."
Yumiko just chuckled.
"You helped me chase away that blond guy, and I promised to treat you to a meal to thank you. How could I stand you up?"
Main story
Looking at the serious-looking butler, Hyuga Gen felt somewhat helpless.
"Butler, are you saying I have the potential to become a Demon-Slaying Ninja?"
"Yes, young master, your mother was the strongest anti-demon ninja of the last era, so you naturally have the aptitude. However, I do not recommend that you become an anti-demon ninja; it is too dangerous."
"You're absolutely right, Butler. Remember to find more people to protect me, and bring that cultivation manual over too; I'd like to take a look."