Is the siren just borderline? The intellect on the spectrum? Let's briefly analyze the seductive types of people from a psychiatric point of view. I won't get into why, just the labels. You'll be able to understand...
The Siren: Borderline Personality Disorder
The Dandy: Dissociative Personality Disorder
The Intellect: Autistic
The Rake: Narcissist
The Coquette: Bipolar Disorder