The Ancient Magus' Bride

Elias, is an odd failure who pretends to be human -- but is it because of his master's words, or because of his distrust for humans, that he stopped communicating about himself? Lindel's alias, Echoes, refers to the to a song akin to the sound of snowmelt, traveling through the wind, causing the blooming of flowers and the dancing of fairies. The magic of the song turns into a mirror the surface of the water Chise peers into. What does she see beyond the mirror?