Despite the Gabon international's controversial character away from the pitch, Pulisic insists he will work hard for Arsenal.
"I think you guys know what type of guy he is," Pulisic told ESPN. "He shows that.
“But, what I think you guys really don't know is just how nice of a character he is and how much he cares and how hard he works.
“I mean, he brought me along so much as a player and helped me and guided me, and he's been such a great guy.
“Obviously, we're sad to lose him, but I'm excited to see what he does."