Kelvin is completely wrapped in bandages with only his left eye and mouth revealed. He dresses in a formal suit, which befits his position as a baron. Additionally, he is wheel-chair bound because he is missing both legs, after Doctor had implemented surgery on him.
Before his plastic surgery, Kelvin wore glasses, had hair, and could walk. His undue obsession with Ciel Phantomhive, as well as his excessive desire to become more beautiful for him, eventually impelled him to drastically modify his appearance.