Formerly a member of Calas Typhon's Grave Wardens, Sinj eventually defected and joined the Consortium of Fabius Bile. Sinj wears a decayed and diseased suit of Cataphractii Terminator Armour, and despite being little-liked by Fabius performed one of his brain transfers into a new clone body. Sinj is said to be one of the last Apothecaries of the Death Guard, for the followers of Nurgle require little medical attention.
Sinj keeps a hulking beast with him nearly at all times known as Paz'uz. Despite its hideous appearance and ability to secrete deadly acid[1a], Paz'uz enjoys playing and serves as both Sinj's guardian and pet.