A

An expressionless young man full of mystery who never reveals anything about himself.

He is the one guiding Lily through the Underground. Some have dubbed him "The Faceless Man" or "Air Head".

He is the one who gives the name "Lily" to the young girl with an Elysian Eye that set foot in the fantastical realm of Underground New York, and he also operates that One-Car Subway Train that seems to move and stop at its own will while guiding Lily toward Manhattan.

He rarely displays any emotion, and occasionally he protects Lily from danger even as he flatly tells her the truth.