Hello. As far as the whole Union story goes, that annoys me too. Always the same crap. Which is a shame because I like both crossover and OP character. I actually have an idea for a Union story that is also a gamer story.
The OC wakes up in the middle of an unfamiliar forest and wonders how he ended up out there. Shortly afterwards he realizes that something is wrong with him. He was a girl now. In fact, he or rather she looks like Gudako from FGO. As she panics, a tutorial quest notification appears in front of her, making her aware of her current situation.
The OC is a CPU Witch, which means that not only does she have the advantage in magic, she also has the ability to transform into a CPU (Hyperdimension Neptunia). Well, actually it has transformations of the four main characters. However, she relies on AI (Dragonball) to maintain her transformation.
Later she will also learn other skills. Including, above all, summoning the espers from FFXVI and building machines, as she has a passion for robots and other sci-fi technology. What else... what else...? Ah right. She has servants as companions, mainly Mash, Saber Alter and Jeanne Alter, as well as machines that she recreates from her favorite franchises. Metal Sonic, E-123 Omega, Sage, Blade Wolf and 2B.
But I want to be honest. I'm not sure how to implement this idea. What I do know is that my OC should be independent. Of course she's not hostile to the main protagonists or anything, sometimes she even supports them, but overall she goes her own way.
As for Haren? If she were to get one, then she definitely wouldn't have several hundred girls. That would really be an exaggeration.
