Vanitas looks like a palette swap of Sora, with black hair and yellow eyes. His outfit mimics Riku's Dark Mode, a red and black bodysuit with a skirt in the back. His mask is predominantly black, with red trim.
Vanitas Sentiment has a black and white version of Vanitas' outfit.
 Journal Entries
 Kingdom Hearts: Birth by Sleep
 The Masked Boy
A mysterious figure with ties to Master Xehanort. He warned Ventus that Terra was in some kind of danger, but disappeared before explaining any further.
A mysterious boy who hides his face behind a mask. He has ties to Master Xehanort. Vanitas warned Ventus that Terra was in some kind of danger, but disappeared before explaining any further.
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