Diehl’s hair in the role is dark brown, neatly styled in a classic 1930s fashion with a slight wave. The hair is kept short on the sides and back, with a longer top that is often combed to the side.Eyes: Diehl's eyes are one of his most expressive features. They are a deep-set, piercing blue, conveying a range of emotions—from intense determination and fervor to vulnerability and introspection. His gaze often reflects his character's inner turmoil and idealism, Diehl’s Gunther Scheller's lean.