Arnold Wesker in The New Batman Adventures
Arnold Wesker is a ventriloquist, who is a seemingly mild-mannered criminal who runs his mob by giving orders from a dummy called Scarface. Scarface, the dominant personality, calls Arnold a "dummy".
Suffering from Dissociative Personality Disorder, he uses Scarfare to act out his alternate personality.
Arnold Wesker in Batman The Animated Series
Arnold Wesker in The New Batman Adventures