Ethan one of the dateable character in Moonlight Lovers.
"Ethan is an embittered vampire, with an aversion for humans. However, a much deeper pain is hiding underneath this layer of hate. Will you become his salvation? Will you help him to find peace?"
From what little we know, he is extremely talented and competent in medicine. Paradoxically to this talent that involves helping others and heal, he hates humans ferociously for some unknown reason, which we may eventually see. At first glance, he seems relaxed and slightly mocking. With Beliath, he shares a certain attraction for the Moondance, with the aim of seducing or ... something else?