Dolphin Mii

Dolphin Mii ( いるか座（ドルフィン）の美衣, Dorufin no Mii )  better known as Mii, is the Delphinus Saintia and personal Secretary Saori Kido, the current reincarnation of Athena, Mii is a special advocate of Athena, which is part of a select group of Saint Women called as Saintias, acting as chaperones and bodyguard of Athena.

In The Past
Mii was possibly one of the girls selected for the Kido Foundation along with other girls.

War against Eris
Years later, Mii is the personal secretary of Saori Kido, which keeps the small talk about the concerns of the latter, then to get to the private institute " Meteor " Mii meets Shō, who sought to meet with Saori to ask about the whereabouts of her Big Sister , Shō intends to continue his way to meet with Saori , but is repelled by Mii, shortly thereafter a sister university asks Shō to withdraw from that place, Mii intervenes saying that is considered to shō , since she had been rude to the young , to say goodbye with a " Beware ". After the battle of Kyōko and Dryade, Mii appears wearing Cloth Dolphin with Athena to Kyōko and Shō subsequently appears before Shō to apologize for the way he acts with her before, but are interrupted by a new attack Dryades .Both fight against invasive , but is defeated it with Kyōko by ATE , which faces after Saori , but they become human shields to defend their goddess.

Meeting with Emony
Mii next demonstrated to Saori concern for the goddess, and this was distracted and pale, young Saintia no doubt give some words of encouragement and say that he would remain at his side. during the Battle of Jabu and Toki, claiming that appears after Emony look from above is rude and Mii was going to educate, quickly saw his Mii Dolphin Cloth starting a battle against Dryade.