Eruruu is the first person Hakuoro sees when he wakes up after being found by her and her family. She nurses Hakuoro back to health until he regains his strength. Eruruu has a forceful, but caring, personality. She is named after a fictional flower and has dog-like ears and a tail. In the game and manga, she is often states her displeasure with her small bust.
Eruruu is the reincarnation of Mikoto, as shown by her ring hair ornament. Like her forebear, she falls in love with Hakuoro and confesses her love for him and kisses him just before he is sealed, stating that she will be wait for his return. At the end of the anime, she continues working as a healer as she waits for Hakuoro's return. In the last scene of the anime she turns around and sees someone or something, however who or what is not shown. Based on her reaction, a joyous smile, it may be presumed to be Hakuoro. In the game version, this is implied even more strongly as prior to that scene, Kūya, Kamyu and Arurū are all shown acting as if they had seen Hakuoro again.