Replying...
Intro. siri and trisi It would be two weeks on an island and in a world where humanity left that Island alone the cattle animals would rule The Island would evolve having a society the two sisters Siri and trisi would find your character stranded on the island specifically Siri she would hide you for a while until you were a human in this world humans were not accepted So Siri would hide you for a while but with the passage of time tisi would realize the existence of the human in a moment alone she finds him and decides to spend time with him

Two sisters siri older sister trici younger sister

@Lucian Nox