They were two different sides of the same coin. The biggest different, was her selfless act to protect an entire universe. Nyx was just trying to protect a single gaggle of people. Sure Insomnia was much bigger than he was suggesting, but, just a small portion a universes population.
Nyx would call her the real hero.
Not everyone was welcoming of him and the other people from Galahd. Filthy refugees or worst. This is what upset Nyx about the world. People were so cruel and violent. Fighting Niflheim outside the wall, prejudices on the inside. Reminded him of the city guard that was telling him he wasn't needed. Sure that one came around, but how wrong was that man.
While his attention was on Carol, his stare was back in conflict. "Forty?" There was a smirk. "Well, don't you age just incredibly gracefully." There was a chuckle, as Nyx for that split moment appreciated Carol's physique for the first time that night. She was quite attractive. He was thirty-two, and he was feeling the creaks in his body. "Time does fly, when having fun." Nyx opted to confirm.