HI GUYS this was a long time comin'
I give you the humanoid form of The Celestial Mother, herself - Lady Tiamat!
This is the Mother of the Mist and ruler / creator of the heavens and skies themselves. Sister to Lord Bahamut, she exists within the space of the Holy Blade - The Maken.
She was placed within the Maken by the original children of Creation and Destruction to assist with the battle against Chaos. Currently she shares the space of a body within her vessel, and the champion of her blade - Valkoinen Pilvi; the Unlimited of Salvation.
Tiamat's wings aren't always present in her humanoid form. She can "store" them within her body so they aren't in the way and they become the markings on her back. Long in the future these wings were tattoo'ed on the back of her vessel in order to mark them as the one bestowed with her power.