Grandeeney

Grandeeney is a female dragon known as the Sky Dragon and foster mother of Wendy Marvell.

Personality
Grandeeney seems to enjoy poking at people's sensitive areas. She is unafraid of making other dragons unhappy by bringing things up that are most likely a sore subject to them.

History
At one point in her life, she found and raised a human girl named Wendy Marvell. Grandeeney taught Wendy the ancient Sky Dragon Slayer Magic and some healing Magic. However, on July-7-X777, Grandeeney disappeared, like all other revealed dragons in the series. and left Wendy for unknown reasons.

Tower of Heaven arc
After the battle, Grandeeney ventures into a volcanic region to meet fellow dragon, Igneel. She starts to make fun of Igneel's foster son, Natsu Dragneel, even to the point where she apparently threatened him. Hearing this, Igneel orders her to leave or else. Before leaving however, Grandeeney hopes Natsu will run into Wendy so a more friendly relationship could be made between the Dragon Slayers, unlike Natsu's "friendship" with Metalicana's foster son, Gajeel Redfox. She also mentions Zeref's name but said she'll leave that for later and can't wait to see Igneel at the Dragon King Feast.
 * Events take place in the Tower of Heaven arc in manga, but Fighting Festivals arc in the anime

Magic and Abilities
Light Form: As shown, she could create a form of floating light, which she used for communication with other dragons.