Maaka Ren

Karin's handsome blue-haired older brother.

He a bit of a lounge lizard with an eye for the ladies, especially those who are stressed. Even though stress is his blood preference, he is often seen as a self-confessed pervert because he enjoys the other benefits he receives from encounters with his victims besides their blood.

He is scornful of Karin's condition and considers her to be almost a non-vampire, yet he is the one who takes her out and realizes that Karin's blood increases are due to the unhappiness of others. Ren usually will only bite women but Kenta, who in addition to being unhappy is very stressed, drives Ren crazy.

Ren's only fear is Elda Marker, who nearly killed him when he was four by smothering him with affection.