Because the hero is a member of Lan, Satoshi Ohno is the biggest (representing blue), followed by Sh? Sakurai (red), Masaki Aiba (green), Ninomiya Kazunari (yellow) and Matsumoto Jun (purple).
For example, I am a fan of Zidan, that is, Runrun. I like Satoshi Ohno so much because Satoshi Ohno is their "man". So they are Satoshi Ohno's "wives", and then they call them eldest sister-in-law. . The same is true of the names of younger brothers and sisters. PS: This season's big brother and little brother are so cute (? ﹃? )