The rulebook says that if a rule on a stat card breaks a rule in the rulebook then the stat card takes precedence. Therefore Zoraida can hire Ophelia into her crew because "Enthrall" takes precedence over the regular hiring rules. It then says that if rules on two stat cards contradict each other then the wording determines which takes precendece, "may" is trumped by "can" which is trumped by "cannot".
Zoraida "may" hire living models with a WP of 4 or less from any faction, Ophelia "may" only join crews in a Brawl that contain Gremlins, Kin, Pigs and Vermin. Which "may" takes precendece? Or does only one model in the crew have to have one of those characteristics for Ophelia to be eligible to join it in a Brawl?