Айна

Aina is Aura's elder sister. As a child she vanished from the household where, alongside her sister, she was connected to Jeanne's family, and she later resurfaces as a skilled maid in the service of a high-ranking lord (the Grand Duke). People speak of her as an "incredible maid."

She is beautiful and draws the attention of the men at court, yet is also physically strong and blessed with razor-sharp intuition — her piercing gaze can unsettle even Tenma. Aina resembles Aura in looks but is quite different in temperament, and on free days she volunteers to train Jeanne and Aura.