opposite of vampire

For a second there he could have sworn to be the opposite of a vampire. He was afraid of the dark, he liked garlic, he did not mind crosses, he was definitely a mortal. There was the bite. His bite was more something of a nibble. He would try to get the neck, but sometimes end up biting the shoulder, or an ear, or just hair. No blood would flow. Well, maybe it did, but in other ways. Blood would just shoot through the body but remain in the veins. No visible injuries. Just scars. Inside. On the heart. Invisible at first. Then hurtful.
He had a very clear mirror image, but it never seemed to be his own.