The so-called big brother is someone who holds a leading position within an established group and can help her quickly integrate into the collective.
As long as you find the big brother and are willing to become his follower, integrating afterwards becomes much easier.
Regularly sending gifts will ensure the big brother doesn't make things difficult for you.
This is what the Dragon Race Maiden learned from "100 Tricks for Workplace Social Skills."
The Dragon Race Maiden looked around at the three maidens, beginning to search for the big brother in this small group.
One was an Elf Maiden who was eating with such gusto that she almost had no image to maintain.
Another was a white-haired maiden who seemed to be overly curious about the castle hall, as if she had never seen the world.
The last one was a Magical Girl sipping her drink calmly, with a dignified demeanor.
"..."
Just a glance was enough to tell who held the leading position here!