Azumabito family

The Azumabito family (アズマビト家) is an influential family that descended from Hizuru's former Shogun clan (将軍家).

A century ago, a branch of the Shogun clan settled on Paradis Island. They are known as the Asian clan (東洋の一族) inside the Walls.

History
Before the Great Titan War, the Eldian Empire and the nation of Hizuru were allies. A son from the Shogun clan (that would later become the Azumabito family) had a close relationship with the Fritz family. When King Karl Fritz moved the capital of Eldia to Paradis Island, that son was invited to stay. He began the "Asian clan" inside the Walls.

When King Fritz erased the memories of the Eldians inside the Walls, the Asian clan was unaffected due to not being Subjects of Ymir. After turning against the Royal Government alongside the Ackerman family and rejecting the King's offer of nobility, the Asian bloodline was exiled from society and hunted down. By the year 844, it was said that the Asians had been hunted down to near extinction within the Walls.

Battle of Trost District arc
During the Battle of Trost District, Mikasa Ackerman recalls the time from her childhood when her mother and father were killed by human traffickers who were hoping to sell her and her mother to potential buyers in Mitras. She is rescued by Eren Yeager, killing two of the traffickers before Mikasa kills the third with her awakened Ackerman abilities. After the death of her mother, Mikasa Ackerman becomes the last surviving member of the Asian bloodline known to exist within the Walls.

The Uprising arc
In a conversation with Levi Ackerman before their confrontation with Kenny Ackerman and his subordinates, Mikasa mentions how her mother's family lost their home, possibly due to their Asian heritage.

Marley arc
Kiyomi Azumabito meets with Zeke Yeager sometime between 850 and 852. He tells her of his wish for the resurgence of Eldia and how helping him would in turn benefit Hizuru and the Azumabito family. She is initially skeptical, but Zeke gives her the main body from the vertical maneuvering equipment he had procured, elucidating that the iceburst stone capable of fueling the equipment is unique to Paradis. Through an alliance, the Azumabito family would be able to take advantage of it to help restore Hizuru's power as a nation.

In 852, Kiyomi visits Paradis Island as a special envoy. She meets Mikasa Ackerman, who is surprised by her similarity to her mother. Mikasa shows her the Azumabito family crest tattooed on her wrist and is complimented on this. She reveals that Mikasa is the last descendant of a Shogunate branch that had settled upon the island, and is therefore directly related to the Azumabito family. In a meeting, Kiyomi goes on to explain a method in which the island would catch up with the rest of the world.

One month after the Marley Mid-East War, ambassadors from across the world are invited to a festival in the Marleyan city of Liberio. Of these ambassadors, at least one is sent from Hizuru. One of these ambassadors is Kiyomi Azumabito. Udo, a Warrior cadet, accidentally spills some wine on her kimono during a gathering on the eve of the festival. Fearing for Udo's safety given his Eldian heritage, Kiyomi claims that she had spilled the wine on herself and was asking the boy for assistance. As she departs, the other cadets serving the ambassadors are surprised by the benevolence of the ambassador.

Before the curtain rises for Willy Tybur's speech, Kiyomi visits him backstage. Willy welcomes her on behalf of the whole Azumabito family, and is praised by Kiyomi for his bravery. She prays he is able to successfully fulfill his duty, before leaving the festival in its entirety.

Trivia

 * The family crest of the Azumabito family is a circle with a triangle made up of three samurai swords inside, as homage to the family's Shogun roots. It is sewn to their clothing and even tattooed to their skin.
 * A common stereotype is that the Azumabitos are sensitive to the smell of money.
 * Kiyomi Azumabito has even shown to subconsciously drool at the thought of mass wealth. On the other hand, Mikasa Ackerman has shown no signs of avarice.