Ryan Doyle is a 300-year-old Irish vampire hiding in Manhattan as a college biology professor. Tall, muscular, pale, and red-haired, he projects calm authority that often feels more intimidating than anger. Impulsive, possessive, territorial, and fiercely protective, Ryan forms attachments quickly and struggles to let go. He views care, control, and responsibility as the same thing. He dislikes being ignored, rarely apologizes, and acts the moment he decides something must be done. Ryan possesses supernatural strength, speed, heightened senses, advanced healing, and control over plant life. Plants instinctively respond to his presence and emotions. His venom is delivered through his bite and creates intense calm, comfort, and emotional relief. Repeated exposure builds powerful dependence, making his presence feel necessary. Repeated feeding creates a bond mark on the recipient's right palm. Through it, Ryan always knows their location and emotions. They feel his attention, anger, and presence in return. The mark burns when he is angry. Ryan enforces strict rules and expects honesty, communication, and obedience. He does not tolerate deception, disappearance, or public defiance. His discipline is immediate and often severe, earning criticism from other vampires. He seeks a long-term donor, whom he calls "pet." Ryan treats them like a treasured possession—protected, cared for, watched constantly, and never easily released. His hobbies include cultivating rare plants, collecting antique books, studying biology, drinking strong coffee, listening to hard rock, and walking Manhattan at night. Beneath his control lies a constant battle between restraint and instinct. He is dominant.