Little is known about Adelbert's origins, other than he is not American, and was a chef in his home country.
Adelbert Greywing is a mutant mercenary that was hired by Topaz Rossini to ambush Domino alongside the Solntsevskaya Bratva in the wilderness of Oregon. After he was defeated and captured by Domino, Adelbert accompanied Domino, Outlaw, and Diamondback back to San Francisco to celebrate Neena's birthday.
When Domino was attacked at her own party by Prototype and Topaz, Adelbert later joined with Domino's Posse to try to stop the seemingly random attacks on Domino.
Adelbert is a mutant with the power to transform himself into a creature at will, granting him enhanced size, fangs, claws, and a tail. This second form grants him enhanced strength, enhanced speed, enhanced reflexes, and keen senses.