Ametsuchi, Akino

天地秋乃

A renowned and long-serving Prima undine, she co-founded the Aria company with Aria Pokoteng after deciding she was missing out on life as Himeya's top ace. She held the title of Prima undine for 30 years and served as a mentor to Alicia, her final disciple, to whom she handed over the company upon her retirement. She commands great respect from younger undines, particularly Alice. She now resides in the countryside, engaging in farming as a side activity, and occasionally visits the Aria company bringing some of the produce from her fields.
Prior to taking Alicia on as a student, Akino had another undine named Anna as a pupil. However, Anna eventually fell in love with one of her customers, married him, and relocated to Burano Island.