Lol gotta appreciate it when a mangaka goes "I know where my bread is buttered" and draws the lewdest looking titties imaginable.
Even though I'm reading the novel, the illustrations aren't included so I have just been picturing an older version of Shalltear Bloodfallen from Overlord or a more evil looking version of Moka from Rosario Vampire as what Lucy looks like. And as it turns out, that's exactly how she's drawn here, like a 50-50 combo of the two.