Charles is a cold and intelligent man who strongly holds views such as social Darwinism, believing that only the strongest are worthy of rising in society. His philosophy is not reserved solely for his adversaries, however, as he treated Lelouch harshly after the death of Marianne, offering no sympathy to his then-adolescent son. He is also deeply cynical, having no confidence in the good of people and believing that humanity's natural course is struggle and conflict.

His voice range would be within the medium low to low range.