Vincent knows when he pushes too far. And seeing a contrite Vincent means just that. He's taking the reaction seriously.

And that Nanaki is a dear friend whose opinion matters to him enough that he'd show such vulnerability. Rising from his seat, he crouches down to be more evenly face to face with the sitting feline and regards Nanaki with grave ruby eyes.

"I'd never replace a friend. I might become friends with someone like the hellhound Nanaki. But he wouldn't be you. The Floods, the Breach. They might bring other versions of us or cause us to interact in different ways, but that won't ever change my friendship with you. Do you understand?"