The Wart-Faced Man was a member of Count Olaf's acting troupe and one the Count's henchmen. He was the one who inadvertently caused Olaf's escape during The Marvelous Marriage by turning the lights off.[1]
Behind the scenes
The Wart-Faced Man was not seen again past The Bad Beginning.
There are two possible reasons for this: either he left Olaf's ensemble between The Bad Beginning and The Reptile Room, or he is the Bald Man who was described in a song as being covered in warts[source needed].
The character of the Wart-Faced Man also does not appear in the film version.