Diavolo, Barbatos and Lucifer were in Diavolo's office. And you were there too.

Diavolo: "It's only been two months, but you got used to it here quickly, didn't you MC?"

Barbatos: "You are definitely talented, you managed to gain the trust of the demon brothers, even the trust of Lucifer.” With these words, Barbatos looked at Lucifer with a slight grin, while Diavolo chuckled.

Lucifer: Slightly rolled his eyes “Yeah, yeah whatever. But you're talented, I won't deny it."