Azure Dragon – Meng Zhang, the blue divine sovereign who protects the East.
The Azure Dragon is one of the guardians of the four cardinal directions in traditional Chinese culture, and according to the Five Elements phylosophy (Wuxing: Ref), the Azure Dragon is a spirit animal of the East. The Azure dragon has been considered a auspicious sign since ancient times, and governs spring (January, February and March).
In the Taoist version of his name, he was known as the divine sovereign ‘Meng Zhang’ and was the founder of the Dragon Tribe (a tribe that lived in the Dragon Realm and respected freedom).
The guardians of the four cardinal directions is another name for the Four Gods (Four Symbols) in Chinese mythology. They are the Blue Dragon, White Tiger, Vermilion Bird and the Black Tortoise (also called "Black Warrior").
Symbol of the five elements of the bagua, god of the four directions, genus of the divine sovereigns.
In Taoism, the Four Symbols have been assigned human identities and names. The Azure Dragon of the East is named ‘Meng Zhang’, the Vermilion Bird of the South is called ‘Ling Guang’, the White Tiger of the West is ‘Jian Bing’, and the Black Tortoise of the North ‘Zhi Ming’.
Astronomically, it corresponds to the Chinese constellations system, the Seven Eastern Mansions of the Twenty-Eight Mansions. The name derives from the seven eastern mansions (Horn, Neck, Root, Room, Heart, Tail and Winnowing Basket) being linked together to form the figure of a dragon.
An interesting article about the history of the leader of the Toyoko Kids, Howl. This details his yakuza background, how he used a false title of social worker to take control of the gang, the way he went about creating the current hierarchy within the gang, and the murder and child r*pe charges he currently faces. You can find more information on this man, the face of Toyoko Kids, by searching for 「歌舞伎町卍会」. This is not an innocent group. This is a gang currently led by a r*pist, with a hierarchy, that convinces kids, teens, and young adults to run away to the red-light district, is responsible for lynchings, stabbings, child prostitution, and drug dealing. This gang is why 地雷系 is associated with any aesthetics at all, because the runaway girls who work for this gang frequently donned a few pre-existing fashions to please Howl - to try to be his "type". This is the origin of "jirai kei" as the west knows it.