Ristarte

Novice Goddess with healing power. She summoned Seiya in S Rank World "Geabrande" in order to save it.

She was actually Seiya's close companion in the previous B Rank world where Seiya was summoned to as a hero. After she was killed by the demon lord, she was reincarnated as a goddess with no memories of her past life, until it was revealed to her later in the anime.