Shuusuke Wakatsuki

As a core member of the original group of five childhood friends, this loyal companion remains close to Sana even after Sana's long absence and eventual return. He serves as Sana's closest male confidant and is the younger twin of Shuri Wakatsuki. Often teased by Yuzuki as the subordinate of the Wakatsuki siblings, he maintains a deep, lasting bond with the friends he once left behind during his childhood years.