Alvinella

Alvinella is the school board director of the Farench Deshka Girls' Academy but also a high-ranked succubus, she stands above the other succubus with a confident and dignified appearance in addition to a much stronger libido that she has to restrain herself from. In order to save her school from closing down due to low erotic deviation scores, she planned to summon a legendary succubus to bring her school back into shape. However, her summoning synchronized with the protagonist's succubus summoning which had forced him to come to Yggdrasil.