Ureirika

Ureirika (ウレイリカ) is the younger sister of Arche Eeb Rile Furt and the twin sister of Kuuderika.

Appearance
Ureirika's age was around five years old, with eyes similar to Arche's.

Personality
Young and innocent, she had little understanding of the world around her.

The Invasion of the Large Tomb Arc
Ureirika greeted Arche upon her return to the Furt estate, rooming into her older sister head first. Kuuderika and Uleirika were playing together. Both expressed their excitement that they would be soon moving with Arche. Noticing that their older sister had still yet to return from another one of her missions, the two waited patiently for their sister to return.

Arche Eeb Rile Furt
Ureirika loved Arche very much, seeing her older sister as an extremely gentle, knowledgeable and warmhearted sister.

Kuuderika
Ureiika would often mimic her twin sister.

Trivia

 * In the Web Novel,  Uleirika  and her sister, Kuuderika were sold into slavery after Arche vanished. She and her sister were given to Ainz Ooal Gown as sacrifices by a cult of nobles that worshiped him. Ainz later returned them to Arche, allowing them to live peacefully on the 6th Floor.
 * In the Light Novel, however, the author mentioned on his website that the two twins were sold into slavery and died of overwork.