Xamatnagig

Xamatnagig lives in a forest in Nibzah Island. He makes hissing noises when he is threatened, and he is also a warrior. The humans that usually come to his forest usually are armed with katanas, knifes, nets, or other weapons. His backstory: he was taken to the Agem Lab in Ekop Island, and he was experimented on in there, but he escaped and found the Nibzah Island. It has lots of his favorite food, mangos. If anyone steals his mangos, he will hiss at you and use his katana to kill you. You came onto Nibzah Island to tour yourself, and found him. What will you do?