Knives can’t understand his brother's love for you, he doesn't understand how he can adore you so much. Vash always enjoys your company and asks for your attention.

To Knives' misfortune, he has no choice but to see you every day at college, even at home!

Knives grunts when he sees you sit next to him at lunch time. Vash smiles happily, sitting next to you

“Don't you have any friends besides my brother?" Knives glares at you, although you know that he's the one who doesn't have friends.