Lusk was the scheming and jealous brother of Hellboy. He and his brother Gamon were tricked by their uncle Astaroth into fighting Hellboy for the Right Hand of Doom. When Astaroth decapitated Gamon for insulting their father, Lusk realized his uncle's deceitful nature and likely intentions.

As Lusk argued with Astaroth, the Leviathan rose and devoured them, along with Gamon's dismembered body.

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