In a romance novel, a man may possess the quality of being passionate. His passion can be seen in his pursuit of love and his dreams. He is likely to be strong, not just physically but also mentally, able to face difficulties and protect the woman in his life. Moreover, he is often intelligent, being able to engage in deep conversations and solve problems that come their way. He might also be a bit mysterious at first, which adds to his allure and makes the female lead (and the reader) more curious about him.
A man in a romance novel often has the quality of being romantic itself. He knows how to create special moments, like arranging a candle - lit dinner under the stars or writing heartfelt love letters. He is patient, as he understands that love doesn't always happen overnight and is willing to wait for the right time with the woman he loves. He is also selfless, putting the needs and happiness of the woman above his own. For example, he might sacrifice his own career opportunity to support her in achieving her dreams. His loyalty is unwavering, staying true to the woman through thick and thin, which is a crucial quality in a romantic relationship depicted in the novel.
Typically, he is charming. This charm helps him attract the female lead easily. He is also often confident, which makes him seem more appealing. And he usually has a kind heart, showing empathy and understanding towards the woman he loves.