>>101257566It's simple, just like with VShojo, Niji or even Phase
Management (different from the group of girls obviously) takes decisions based around the opinions of the talents, at the end of the day, they want to build of a "friendly" environment, while also keeping a line by adding people outside of that box that won't be either controversial, for the grift or would not work with current talents. At best, manage a neutrality. So, it is not odd that people from backgrounds connected to current members tend to happen. In the working world, we call these recommendations, or more formally putting a good word.
Then also comes the fact that people that know each other in the background know exactly what got them into that position.
Also, nepo is for families. What you are referring is cronyism, which in reality it really shows more to Sana than anyone in any corpo.