Ymir Fritz

Yumiru Furittsu (ユミル・フリッツ) was a figure of Eldian mythology. She was an ancient Fritz family monarch and is said to be the first of all Titans.

Appearance
In all illustrations depicting Ymir Fritz, she is shown as a young girl wearing white robes. In the book Frieda Reiss reads to Historia, Ymir is dark-haired, whereas in the book Mr. Yeager reads to Grisha, she is fair-haired.

In her Titan form, Ymir appears to have had blonde hair. Little else can be said about her Titan form, since all depictions of her in old books and illustrations appear to be highly romanticized.

Personality
Being a subject of legend, little is known about who Ymir truly was as a person. However, when reading about her story to Historia, Frieda Reiss describes her as a kind girl who is always thinking of others, as well as lady-like. Additionally, the Eldian peoples such as Grisha Yeager speak of Ymir with great reverence, praising her accomplishments for their people.

History
Over 1,820 years ago, it is said that Ymir Fritz made a bargain with the Devil of the Earth. What she offered to the Devil is unknown, but in return she was made into the first of all Titans.

As the Progenitor Titan, Ymir is said to have used her Titan Power to cultivate barren lands, build roads across the lands, and raise bridges through the mountains of the world, overall bringing great changes to her civilization. After an unspecified amount of time, Ymir died, and her "soul" was split between nine successors. However, her memories would live on throughout the generations due to the abilities of the Progenitor Titan.

The Uprising arc
Many centuries later, Frieda Reiss, a descendant of Ymir, visits her half-sister Historia on the farm where she is raised. During some of her visits, Frieda tells Historia the story of Ymir's deal with the Devil. Frieda advises Historia that she must be lady-like, as Ymir was. She speaks of Ymir as being an altruistic girl, and urges Historia to be loving and beloved like her when she is grown. However, Historia does not remember these visits, since Frieda always used the Progenitor Titan to erase her memories after every encounter. Historia would only recall vague images of Ymir's story in the years to come.

Return to Shiganshina arc
Some years later, when the Survey Corps discovers Grisha Yeager's basement, they find three journals. Within Grisha's writings, he recounts his childhood when he was told the story of Ymir and her people by his father. Grisha writes of joining the Eldian resistance in the nation of Marley several years afterwards, learning of the supposed great accomplishments achieved in Ymir's time. Together with the resistance, Grisha declares that they must venture to the island of Paradis, where Ymir's descendants had fled eighty years ago, in order to retrieve the Progenitor Titan and bring back the nation of Eldia.

Trivia

 * Her name is the very same as a primeval being in Norse mythology who is the progenitor of all Jotun, or ice giants, and the first living being. Ymir also means "the scream". Both names apply well to Ymir Fritz, who was the progenitor of all Titans and possessed the power of the Progenitor Titan, once known as the "Scream" (叫び) by the Survey Corps.
 * Ymir Fritz's Titan is the only Titan ever depicted with any type reproductive features; in this case, nipples.