Blackwater Islands Who am I?

The boy understood his duties - he was to patrol the island and guard it from outsiders, and should he find anything of interest, he was to return to the Speaker. And when the Speaker spoke of a new language, the boy nodded, his tail waving. It sounded like a game, like secret code! He let loose a sigh of relief, no longer feeling afraid, or like an outcast. This could be his home, he saw that now.