The Right Hand of the Twin Gods
More world building for Koetai, so I imagine her as the only one really close to the twins, and granted I created her before the game came out, she was the very first member of the cult. She knew Troy and Tyreen before they became became Gods, before they were Calypso and still Deleon.
She's crazy, years of abuse did that, but not all of her is lost. Though she is insane a few shreds of humanity still cling to her mind, she helped Troy build his arm after he showed her the blueprints, she helped Tyreen cut and dye her hair, she even helped build the Twin's Cathedral.
She idolizes the twins so much she even dressed as badly as they do, an outfit with one too many different colors. An orange and red shirt, a black spiked jacket, light brown pants with a green belt to keep them up, and a pair of silver and gold boots. Looking like hot trash 😂. She even shaved the side of her black hair in honor of Tyreen.
When Troy is sick Koetai is by his side, when the twins need to vent or need a shoulder to cry on Koetai is there, when Tyreen is in a bad mood because she keeps accidentally killing people Koetai is there to listen. She only feels normal when she's the twins, they are her sanctuary in this cold and unforgiving world.
Unlike regular humans Tyreen can't accidentally leech a siren, she has to actually try in order to do it, so she enjoys hugs and soft touches from Koetai, massages and light butterfly taps. One of the many reasons was she's allowed in her private quarters.
Troy also lives her massages, but what really gets him is how she expresses genuine interest in his hobbies. Beatboxes, spray-painting, tinkering with electronics. She's into anything and everything he is.
Along the way they give her a title, The Burning Angel, at first it was just a name I came up with, but after playing the game I made it as they mocking Lilith who was no longer the Firehawk.