Bloodyen

Bloodyen (ブラッディアン) is a race of the same class as Vampire.

About
Race born and lives in the biggest downtown area of the dark planet. Have the ability to compete with a variant monster. The ecology is almost the same as that of humans, but it has strong power such as blood sucking. If you bathe in the blood of a monster, you raise it up, but if you have a negative effect on your mind, it becomes dirty and it becomes a runaway condition. There is no coping method other than killing until it returns to me at this time. It has a fast hematopoietic rate and can eliminate dirt by licking and batting Bloodyen's blood. However, it hurts religious tools such as the cross and holy water, because it weakens when exposed to sunlight. You can freely change the size of your body, transform into animals such as bats and wolves, fog and steam, enter any place. You can also walk across loose water flow or the gentle sea level.

Source

 * Mary Skelter: Nightmares
 * Vampire