|First Appearance||Chapter 1 section 3 story 3.3; Cleansing|
Echo belongs to Hijiri Sakuma.
Echo is a spirit with pale skin and brown eyes that take on a yellow or red tint depending on the lighting. According to the devs, Echo and Sola are genderless. Echo's hair is cool grey and cut short at the back, leaving Echo's hair long at the sides. Echo wears two red triangular hair ornaments. There is a small black marking on Echo's forehead.
Echo wears a red, gray, and black kimono-like outfit and a necklace with a large red pendant.
Echo is a polite, observant daemon with a teasing streak. Echo is loyal and dutiful; Echo obeys all of Hijiri's orders and also gives Hijiri advice on how to handle certain situations.