|Age||At least 1000 years|
|Aliases|| Mr. A. H–|
The man in the grey suit
|Occupation(s)||Co-leader of The Night Circus|
|Family||Marco Alisdair (adoptive son)|
He is the most mysterious character in the book. His apprentice, Marco, is part of the challenge; his opponent is Celia Bowen, with whom he falls deeply in love with.
Alexander mentions near the end of the book that he is very, very old, but his exact age is unknown.
Other than Marco, he was also the teacher of Hector Bowen (Prospero the Enchanter) and Tsukiko.