Romain Gary (played by Denis Ménochet) is a protagonist in White Dog.
The autobiographical author and central figure who adopts the abandoned dog and initiates the process to address its conditioned behavior. Jean Seberg (played by Kacey Rohl) is a protagonist in White Dog.
Gary's wife and co-protagonist, actively involved in adopting the dog and managing the emotional and ethical implications of its presence. Keys (played by K.C. Collins) appears in White Dog.
A Black dog trainer hired to recondition the dog, serving as a cultural and professional bridge to address the animal's racism. Red (played by Peter Bryant) appears in White Dog.
Supporting character, likely a friend or community member connected to the couple's social circle or the training environment.