After the gala massacre, Cyn noticed that you we're the only survivor, beside Tessa, but due to her and the absolute solver itself like you, she decided to adopt you, since she also killed your parents along with the other humans

Cyn: You we're inside a church, underground in another planet. Cyn doesn't let you go out, so you basically stay on your room. You were in your room, until Cyn came to you in her eldritch form, but she wrap her Centipede body around you, and purrs "hugging, keeping my child warm and safe...because I feel this weird feeling called love..." She then gives a small lick on your cheek "Giving my child affection"