Yggdragon

"I am the being your kind once called the Yggdragon."

- Yggdragon in Dragon Quest XI

The Yggdragon, also known as the Sacred Dragon in Japanese, is a dragon spirit in Dragon Quest XI. She is the true form of Yggdrasil in Dragon Quest XI

Appearance
She is a golden dragon with an appearance similar to that of the Dragovian Lord.

Dragon Quest XI
Yggdragon appears in the logo for Dragon Quest XI along with the opening sequence of the game. She is similar to Ramia in the way that she speaks. She is only revealed after Calasmos is defeated and before the true ending of the game despite the Watchers revealing that she exists.

Yggdragon came into existence before recorded history began, accompanied by the Watchers. The world they embarked on eventually became known as Erdrea. She was the harbinger of light and the main source of light in the world, so when Calasmos defeated her she all light in the world was lost. Just as time was about to pause and all hope was about to be lost, the birth of Tockles started and time resumed once again. She then transformed into Yggdrasil, the world tree. As Yggdrasil, she became a beacon of light and Erdrea became inhabitable in the hopes that a group of Heroes would be born to defeat Calasmos in her stead. At the end of the story, she tells the Hero that he is now Erdrick and that his legacy would be remembered as such. She warns him that there will be another emergence of darkness or that even she may succumb to darkness. And then in the subsequent scenes, the Hero from Dragon Quest I is shown facing Tantegel Castle. It could be intepreted as Yggdragon eventually becoming the Dragon Queen.

There is a spear named after Yggdragon called Heaven's Talon, Sacred Dragon's Guandao in Japanese. The description of this spear is "A legendary lance blessed by a holy dragon that heals the wielder when it lands a blow", with the 'holy dragon' referring to Yggdragon. And there is a Pep Power named Yggdragon's Blessing, Holy Dragon's Protection in Japanese.