The Lords  Or Better known as the Thrones - Only seven controlled main parts and ruling of earth. these are devine dragons meaning unless you are a jacked up power weapon your not killing these creatures. They are invisible to the human eye and they often speak in tour mind then out of their mouths. they can be as big as a skyscraper or amountain but they can't harm the human race themselves only sending the princebles to do their job. invisble to the human eye

The princeable's - they rule certain aspects over the realms and do jobs for the lords at times. Like thantos controls over death itself while Hades rules over the domains as a whole. The same would go with Life, he would have dragons that give certain aspects of life to maybe breath of life, child birth as well as blessings of birth and breathing. Small like demigod dragons. they speak english and do small jobs but they can't leave the realm for very long. These dragons can be the size of a truck or a small house. invisble to the human eye

The Servants - They care and keep the Hero's as well as the princeables and Lords content in their realm. these dragons are just dragons of small things like an animal or something. They hold nothing speical and can't speak in human tounge. These dragon sare usualyl the size of a dog or cat and they do not fly a lot.