Nanamori Souji

"We are the Summer Festival Executive Commitee — a secret society working day and night to revive the summer festival."

Ryuusei's classmate.
Souji has always seen Ryuusei as a rival, because they're the same age.
A stickler for the rules, he values being just and fair above all else.
Although he's always at odds with Ryuusei, he'll still give him praise when it's due.
Coming from a lineage of politicians, he wishes to do everything in his power to contribute to the local community.
The island's declining population is one of his major worries.