"Naruto and Sasuke progress as a pair.
So when I write about Naruto, I always have to think about Sasuke."
No one affects Naruto the way that Sasuke does. No one is paired with Naruto in Kishimoto’s mind the way that Sasuke is. Even when they’re separated, they’re still together, heart and soul, because their development depends on each other. There can be no Naruto without Sasuke, and vice-versa. That’s love.