Appearance
Ymir Fritz was a small woman, with straight-cut bangs, and long light hair. Her normal attire consisted of tattered clothing with a cloth headband, sash belt, and leather sandals laced above her ankles.
Personality
Being a subject of ancient history, there are various interpretations of who Ymir really was. Frieda Reiss described Ymir as a kind girl who was always thinking of others. Eldians speak of Ymir with great reverence, praising her accomplishments for their people. On the other hand, the Marleyan propaganda maintains that Ymir was a pawn of the Devil, with whom she had made a deal, causing her and all her subjects to be despised by much of the world.
In reality, she was a slave with no will of her own. She submitted to the Eldian king in life, building him his empire, brutally destroying his enemies, and bearing his children as he commanded. Ymir even went so far as to sacrifice her own life for his. Even in death, her soul remained blindly obedient to the Eldian royal family, creating Titans by hand for about 2,000 years in the unknown land surrounding the Coordinate. She has only shown signs of embracing her own free will after she encountered Eren Yeager. However, it is possible she always had some free will, as she had intentionally freed a group of pigs from their pen and let them run free as a slave.