Samael

Samael is a Dragon/Angel Hybrid known as the Dragon Eater. As its title implies, it has the ability to destroy other Dragons.

Appearance
Samael has a upper body of an Angel and a lower body of an Asian Dragon.

Personality
Due to the multiple layers of sealing place on Samael, Samael is unable to show his personality but according to Ddraig, he has a strong evil intent on Dragons.

History
It is said that long ago, Samael was the perpetrator that influenced the first humans, Adam and Eve, to eat the Fruit of Wisdom, and was cursed by God to become a Dragon because of God's hatred on Dragons. Following the curse, it was sealed in the deepest part of the Underworld, Cocytus.

Plot
Hades summoned it from the Underworld and gave it to Sousou temporarily as part of the alliance. During the battle between Sousou and the Gremory and Vali teams, Samael's poison was injected into Vali's body, while Issei received the poison through an arrow fused with Samael's blood during his fight with Shalba Beelzebub. He is then resealed back into the Realm of the Dead.

Powers & Abilities
Samael has a powerful curse like poison that is extremely deadly to Dragons and Dragon Possessers. The poison can also affect snakes or snake related beings.