Origin
Aruru
Aruruu (アルルゥ) is the younger sister to Eruruu. She is often seen with two of her pets: Mukkuru, a tiger offspring of Mutikapa, and Gacatara, a Mikyuum. Her name is based on the Aruruu Flower. She makes an appearance in Itsuwari no Kamen with Kamyu not only to establish friendship between Yamato and Tuskuru but also to find Kuon. She makes another appearance when Yamato invades Tuskuru, during which with Mukkurru, she leads the supplies along with Haku, Kuon, Rulutieh, Atui, Saraana & Uruuru, and Kokopo from Yamato over to their camp while Kamyu distracts the rest of the supplies back to the harbo Source: https://utawarerumono.fandom.com/wiki/Aruruu
Utawarerumono
An injured man is found in the woods by a girl named Eruruu, and everything about him is mysterious. Without knowledge of his past nor even his own name, he is welcomed to Eruruu's home and is given the name Hakuoro by her grandmother, and younger sister, Aruruu. While the inhabitants of the village have large ears and tails, Hakuoro's defining physical trait is quite different as he has neither ears nor tail, but only a mask that he cannot remove. Soon after he becomes a part of the villagers' lives, a revolution against the tyrannical emperor of the land begins, and the conflict finds its way to his new home. Hakuoro must do whatever he can to save the people and the village that he has come to love, all while uncovering the mysteries that shroud his past.
