Aishia

Summary
Aishia is Rio's contract spirit, she has been contracted with Rio since the start or the novel and at the time Haruto's memories awaken, he hears Aishia's voice when he was in a crisis. She is a high-rank spirit which is incredibly rare. Aishia was the one who taught Rio spirit arts before Seirei no Tami.

Aishia spent the 3 preludes arc mostly by sleeping and occasionally her voice sounds to help Rio. Aishia wakes up in Rio's bed when she manifested. This was a few days after she gave Rio instructions on where Miharu and the rest were.

Appearance
Aishia is stated many times in the story as the most beautiful female in the series. She has a very divine look as said by Rio seeming almost artificial in a way, her beauty leaving a cold and fleeting impression. Aishia has extremely long pink hair reaching down her waist and gem-like eyes with the same colour.

Personality
Aisia is a caring and curious girl. She is devoted to Rio and will always accept him. She always wants to try living the same as human do, eating good food, taking a bath, and wearing a cute dress. Though she's pretty blunt in her word, she has a weak expression, even almost expressionless most of the time, and she speaks in a monotone intonation.

According to Dryas, it's unnatural for Aishia to shown lack of expression as a spirit's personality should mature and when their reach high-class humanoid spirit, they should already have full personality, yet although a humanoid spirit, Dryas feel like Aishia is like a Medium class spirit mental wise, unless, being an expressionless character are indeed her chosen personality.

Relationship
Rio / Haruto Amakawa: As Rio spirit contract, Aishia knows everything about Rio, including his past life, his dream, his feeling, and his regret, For Aishia, Rio is her everything.

Latifa: Though at first Latifa is quite anxious around Aishia, they become closer after Aishia tells her that she knows everything, even the fact about what he is doing back in Japan that Haruto does not realize and that anyone that precious for Haruto will be precious for her. After this Latifa starts calling her 'Ai-nee'.

Celia Claire: Aishia has an amicable relationship with Celia, they often fight side by side, when Rio plans to go north, Aishia the one that offers herself to stay and protect Celia.

Ayase Miharu : Aishia has a friendly relationship with Miharu and Aishia even took a cooking lesson from Miharu. Miharu refers to Aishia as Ai-chan.

Dryas: As the same Humanoid spirit, Dryas has quite the curiosity for Aishia and they get along well.

Abilities
Spirit Art: As a high-class spirit, Aishia is the pinnacle of spirit art, moreover, she also a universal attribute spirit, meaning that she can use all attribute in their strongest state.

Martial Art: Aisia possesses the same martial art with Rio through some kind of imitating ability.

Spearmanship: Aishia main weapon is a long spear and she seems pretty good at it.

Telepathy: By creating a path that connects their soul, Aishia can communicate with the one connected with her telepathically, while her main path is her contract with Rio, she also can create a temporary path when getting separated from Rio, her telepathy range can encompass an entire city.

Dream Creator: Aishia can create a dream and show it to someone that's sleeping, it can range from good dream to bad dream and the one that experiencing it can only follow the dream without any ability to change anything in it.

Trivia

 * Aishia name come from the Spirit people language that means a warm Spring and A Beautiful Spring, with the latter meaning sharing the same meaning with Miharu name