The guard with brown hair is a certified cutie. He thinks Thalia smells sweet like honey and goes out of his way to care for her. Knowing how this book ends badly for her (I think with the white haired knight killing her, or if not, not saving her), I'm rooting for the cutie.
The alpha dick can have all the other men and women he wants, but he put a possession aura on the omega, so nobody else can have him. Literally saying he'd kill anyone who touched him. Can we please get a little balance, my god.