Midgardsormr

Midgardsormr is one of the Five Dragon Kings. Known as the the Sleeping Dragon and Dragon of the End, he is the largest Dragon in existence. He is the second child of Loki and the younger brother of Fenrir.

Appearance
A gray Western Dragon with a very large body.

Personality
He is a extremely lazy Dragon, spending most of his time asleep. He is also quite ignorant towards others including his father and brother, claiming that they are meaningless existences to him.

History
Midgardsormr is the middle child of the Giantess Angrboða and the God Loki. Eventually, Midgardsormr grew so large that he was able to surround the earth and grasp his own tail. When he lets go, the world will end, earning him the nickname "Dragon of the End". Though immensely powerful, his extreme size and laziness left Asgard scratching their heads and they decided to have him sleep at the bottom of the ocean until Ragnarok, thus earning him the second nickname "Sleeping Dragon".

Plot
Midgardsormr was mentioned in Volume 4 when Ddraig explains to Issei about Ophis and the Five Dragon Kings. At the beginning of the Heroic Oppai Dragon arc, the sleeping Midgardsormr is summoned by the Occult Research Club and Vali Team through the Dragon Gate to ask for advice in preparation for their battle against Loki and Fenrir, telling them the method to temporarily capture Fenrir and how to defeat Loki.

Powers & Abilities
Midgardsormr is the most powerful Dragon King, mainly due to his massive size.

Trivia

 * His Dragon Gate color is grey, the same colour as his body.
 * Midgardsormr's name comes from the Old Norse word for the modern name Jörmungandr.
 * In the Old Norse language, Midgardsormr means "Midgard Serpent".
 * Despite being a Dragon, Midgardsormr was actually depicted as a serpent in Norse mythology.