Aruruu is Eruruus younger sister. Shes very shy and overall quiet. Like Eruruu her name is taken from a fictional flower saying that the Eruruu and Aruruu flowers grow together. After Mutikapa a large white tiger that is nearly invulnerable to small weapons is defeated by Hakuoro she tends to her baby tiger whom she names Mukkuru. Mukkuru grows in a very short time and becomes Aruruus mount in battle.