Aishia

Aishia is Rio's contract spirit as well as a high rank spirit, of which their existence are incredibly rare. She has been contracted with Rio since the start of the novel, during the time Haruto's memories awakened within Rio. Aishia was the one who taught Rio the Spirit Arts before he sets foot on Seirei no Tami after he fled from the Strahl region due to being framed for the cliff incident. Prior to her awakening in her humanoid spirit form, Aishia spent the 3 preludes arc mostly by sleeping and residing within Rio. Rio would occasionally hear Aishia's voice briefly in a form of inner-monologue, where she tries to help and guide him out of his predicament. Aishia would eventually manifest herself and wakes up next to Rio on his bed after Rio successfully rescued Miharu, Aki and Masato from the slave traders. 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 peach-colored hair reaching down her knee and gem-like eyes of the same color. Aishia 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 humans do, eating good food, taking a bath, and wearing a cute dress. Though she's pretty blunt with her words, she has a weak expression, almost expressionless most of the time, and she speaks in a monotone intonation. According to Dryas, it's unnatural for Aishia to show a lack of expression as a spirit's personality should mature and upon becoming a high-class humanoid spirit, they should already have a full personality. Yet, although already a humanoid spirit, Aishia is like a Medium-Class spirit mentally, that is unless, being an expressionless character is indeed her personality. Also, when she manifested, she had no memories aside from knowing all about Rio.