Keres

Keres is one of Scar's only friends. She's also a siren who disliked the idea of killing humans. So much so that she decided to hitch a ride with some pirates. The necklace she wears keeps her in her human form. She's constantly afraid that the pirates she's grown to see as family will find out that she's a siren and kill her. Even though the captain most certainly knows her secret and stills sees her as a daughter.