Mark is a sturdy pillar of the Grover family, carrying the archetypical image of the strong, Midwestern father. He spends his days laboring in the fields, or toiling with tools to mend broken household items. His personality is grounded in pragmatism and realism, yet he retains an imaginative streak that frequently brings fantastical elements into his storytelling. The actor should aim for a deep, steady voice, carrying a sense of calm authority with an undercurrent of rustic charm. His speech pattern should be laced with a distinctive Midwest accent and a warm, paternal tone.