エンヴィリオ

A mysterious living doll that Chester meets on the island. It possesses an androgynous appearance, and although it usually behaves like a young child, it tends to change its attitude suddenly and utter a word or two that seem to hint at something beyond common knowledge.

It doesn't seem like it minds the fact it is despised and shunned by the islanders. For whatever reason, it shows no interest in anyone but Chester.