Nero tilted his head at that. He guessed this 'sibling rivalry' could actually be compared a little to Credo and himself as well. At least if you took in mind what Dante just told him. However, it didn't just look like it were just brotherly competition. Something went further than that. It was only expected to happen with the twin sons of the Dark Knight Sparda, right? Where would be the flare that followed that name anywhere, if they didn't even have a little drama in the family?
There was something that didn't click: "You told me Yamato served to separate the demon world from the human world. But then, it's his sword. So how did you two rival each other, if the sword's function is to protect the human world?"
Though he was actually surprised when Dante compared himself and Nero to the relationship with his brother. Is that how he saw him? It made Nero wonder if he actually meant to sound somewhat fond of him that one or two times. The sparring, verbal or physical, reminded him of his relationship with his brother... He wasn't exactly sure of how he was supposed to feel about that, so he just shrugged the confusion away as well as using the motion as an action as he crossed his arms again.
"You deserve every single one of them," he stretched his leg and kicked lightly Dante's leg with the tip of his boot, mischief lacing his voice tone. "Seriously, what are you. Five? You keep playing me around all the time."