天草 四郎 時貞 (アマクサ シロウ トキサダ)

An Outsider who washed up on the shores of Tenguu Island.
He was naturalised into the Green and is currently living with their leader.
He still has memories of his former life, but he refuses to talk about his past.
He keeps a pet white mouse named Paris, who is Daifuku's younger brother.

In "Catharsis" he has succeeded as the leader of the Green and spends his days busy as their representative, while also exploring his role as an Outsider.