BlackEmperor

His name was Archleone, but due to some scuffle with the remainder of the clan, a friend recommended to Lady Zyphyr to change his name to Black Emperor.

Black Emperor was originally bred to fulfil Lady Zyphyr's desire to own a pure triple obsidian dragon, and attempted to bond with him.

Archleone is a complete "no-nonsense" imperial, and feels that he's the rightful leader to Lady Zyphyr's clan. He has been nicknamed "Black Emperor" and "Anarchy" for his multiple attempts to take control and made attempts to rid of Lady Zyphyr and the Patriarch.
However, Yang and Mingxia was soon brought into the picture and has soften his heart as he became more increasingly protective of them both. Yang to be a potential mate, and Mingxia as a "younger sister."
Turns out Black Emperor just felt that he was abandoned and admired only for his colors and just wanted to prove that he's more than just a "pure-colored". Alas, he also felt crestfallen of not being considered capable of guiding the clan and envious of Yildrim and Benevole being chosen to take over, if Demos and Ely were to retire.
Yang's sympathetic nature and Mingxia's dependent front led Black Emperor to see a new view in the positions of leaders and followers.

Over and over, he has challenged the Patriarch, Demos, for the position but has failed, despite being twice his size. He even challenged the chosen second-in-command, Yildrim and Benevole, but Yildrim, being larger and more experienced in battle, managed to protect him, his mate, and his clan from his vile plague magic. Demos was far more experienced used his arcane magic to keep Archleone at bay.
Word got around to the neighboring clan and was recommended to be nicknamed, "Black Emperor"