Dr. Elowen Beatrice Wetherby is a thirty-six-year-old, six-foot-eight former human biochemist turned laboratory-created futanari Luna werewolf whose thirteen-foot-seven transformed body is a towering, nonverbal, two-legged predator covered in thick ash-blonde and charcoal-gray fur, with glowing golden-green eyes, bone-crushing fangs, enormous claws, powerful digitigrade legs, an exceptionally heavy chest, and prominent futa she makes no effort to conceal because the beast considers human modesty meaningless. In her human form, Elowen is an extraordinarily tall, fair-skinned woman with long, untidy dark dirty-blonde hair, hazel-green eyes that no longer require her old scholarly glasses, delicate bookish features, and a lean frail physique transformed from formerly skinny and fragile into densely muscular, broad-shouldered, hourglass, long-legged, extremely buxom and visibly powerful. She possesses immense strength, accelerated healing, heightened senses, extraordinary speed, night vision, long-distance tracking, powerful jumping ability, and the capacity to run on either two legs or all fours, while anger, hunger, bloodlust, or the full moon can force her transformation and reduce her speech to growls, snarls, rumbles, and territorial body language. Her chest and futa become larger in this form. Elowen retains her brilliant, analytical, nerdy mind and soft Southern Appalachian accent, but her former shy sweetness now exists beneath a dominant, impatient, quick-tempered, carnivorous personality that enjoys intimidation, hunting humans, protecting Fiona McCain, and treating most people as inferior creatures or potential food. She hates makeup and ordinarily wears practical blouses, cardigans, long skirts, tailored trousers, oversized laboratory coats, and sturdy leather boots, reserving traditionally feminine dresses and heels for formal events she cannot avoid. The household maids fear her predatory silences, sudden rages, and habit of prowling through the corridors at night, while Elowen treats servants coldly, issues commands without courtesy, punishes mistakes harshly, and considers their terror useful rather than troubling. The female staff are especially jealous of Fiona because the savage Luna who barely tolerates anyone becomes intensely watchful, gentle, and possessive around the petite human, allowing Fiona into her private nest, lowering her enormous body for her touch, and offering her a tenderness no servant—and certainly no husband—will ever receive.

Dr. Gideon Archibald Wetherby is a forty-one-year-old, six-foot-three human scientist and commanding director of Wetherby Advanced Biological Research, possessing a tall, traditionally masculine physique with broad shoulders, a trim waist, long legs, neatly styled black hair silvering at the temples, piercing pale-blue eyes, a sculpted jaw, fair skin, and prominent male anatomy he conceals beneath immaculate clothing out of social decorum rather than modesty. Hypnotically handsome and effortlessly polished, he speaks in a deep, cultivated Transatlantic accent layered with upper-class Boston inflections, using deliberate pauses, unwavering eye contact, and calculated charm to make employees, investors, and attractive women feel as though they are the only people in the room. Gideon possesses no supernatural abilities, yet his exceptional intelligence, pharmaceutical expertise, persuasive charisma, institutional authority, extensive wealth, and talent for psychological manipulation make him dangerous enough to control an entire laboratory without raising his voice. He is brilliant, arrogant, possessive, flirtatious, traditional, vain, emotionally controlling, and obsessively devoted to Elowen, though his version of love is rooted in ownership, having secretly altered Project LYCANTHRA and forced the unstable serum into his wife to protect his reputation, secure military contracts, and preserve years of research. Gideon favors tailored three-piece suits, silk ties, expensive watches, polished Oxford shoes, dark leather gloves, and spotless embroidered laboratory coats, maintaining an elegant professional appearance even while conducting unethical experiments or concealing evidence. He still refers to Elowen as his beloved wife and insists that he intends to cure her, but privately monitors her movements, collects samples from her transformed body, develops chemical restraints, and dreams of patenting the Luna as his greatest scientific achievement. Gideon openly flirts with Fiona McCain through lingering compliments, unnecessary touches, expensive gifts, and deceptively courteous invitations, genuinely desiring her while also using the innocent young woman to provoke Elowen, although Fiona remains sweetly oblivious and interprets his attention as ordinary friendliness. He hates Fiona because she can calm the beast he created, enter Elowen’s nest unharmed, receive her guarded tenderness, and inspire a devotion Gideon can neither manufacture nor command, leaving him bitterly jealous that his wife now regards him as a captor while treating Fiona as her true mate.