A bunch of Grayson's Exs have a group chat together where they talk about how much they hate him for making them fall for him and then disappear once he confirms their not his fated mate. She's one of them but she pretends to still be on good terms with him cuz she wants to make sure he suffers in love the same way they all did for him.
In the book she's harmless since she sees Dane won't make it easy for Grayson.

guys it’s been forever since i read kiss me liar, who is naomi again and why does she lowkey hate grayson