This isn't one of those horror stories where things aren't always what they seem, and Jennet is no disembodied ghost going bump in the night. She's fully embodied, with eyes, clothes, and skin—even if that skin does look like bone. In The Woman in Black, appearances matter. From Sam Daily's beefy hands to the gaunt, empty house, what's outside gives us a pretty good clue to what's inside. And it's not always good.
In true gothic fashion, the woman in black's ghastly appearance is an accurate reflection of her inside.
Sam Daily is one character that does not match with his appearance; he turns out to be far more insightful and thoughtful than Arthur initially thought.