Ryouichi Mitani

Ryouichi Mitani 「三谷 良一 Mitani Ryōichi」 is a boy who lives on the island.

Etymology

 * The name Ryouichi means "good, virtuous, respectable" (良) (ryou) and "one" (一) (ichi).
 * Ryouichi's surname Mitani means "three" (三) (mi) and "valley" (谷) (tani).

Trivia

 * Ryouichi has a tendency to take off his clothes regardless of place or time.
 * Ryouichi has remodeled a warehouse in the mountains to make a secret base and it has become a gathering spot for his peers.