Barca swooped for Vidal over the summer, clinching his signing from Bayern Munich.
Valverde admits the Chile international has taken little time to settle at the Nou Camp.
He explained: "He's a perfectly integrated player because he's an extrovert.
"He's constantly talking on the pitch and that's good for us."
Vidal is the one addition this summer who Valverde has so far turned to in the opening weeks of the new season.