Mitch is a large dog with a physically imposing presence, marked by significant size and strength. His initially intimidating exterior suggests aggression, yet he possesses a fundamentally gentle nature. This contrast defines his role as a protective guardian figure.

He forms a deeply loyal bond with the young boy Sebastien, serving as his primary companion and unwavering protector. Mitch demonstrates absolute devotion to Sebastien's safety and well-being. His protective instincts surge when threats arise near the child, particularly from humans. Mitch adheres to a strong moral code, refusing to harm those deemed undeserving of violence. He holds a general aversion to unnecessary aggression but will decisively engage in combat when essential to defend others.

Mitch's protective nature extends beyond Sebastien to encompass vulnerable individuals, including other children. He combines physical power with a kind disposition, embodying the archetype of a protector who uses strength solely for defense and care.