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David Serachin is a "rogue-scientist" who shares a laboratory with Isaac Dan der Grimnebulin and Lublamai Dadscatt. He keeps a pet badger named "Sincerity".

Events of Perdido Street Station[]

During the events of Perdido Street Station, Serachin often eats lunch with Lublamai Dadscatt, and becomes his caretaker after Dadscatt is attacked by Isaac's newly-matured slake moth.

Serachin later betrays Isaac to the militia after learning that the New Crobuzon government is seeking the Slake Moth larvae that Isaac once had. He and Vermishank are outed as informants by their reprogrammed cleaning construct, and Serachin flees from the laboratory with Sincerity shortly after Vermishank is killed.

Characters in Perdido Street Station
Main characters

Isaac Dan der Grimnebulin · Lin · Yagharek · Derkhan Blueday · Motley · Mayor Bentham Rudgutter

Minor characters

Andrej Shelbornek · Benjamin Flex · Cornfed Daihat · Construct Council · David Serachin · Lemuel Pigeon · Lublamai Dadscatt · Magesta Barbile · Montjohn Rescue · Montague Vermishank · Pengefinchess · Shadrach · Silchristchek · Tansell · Eliza Stem-Fulcher · Teafortwo