Millicent

Millicent was the former Wind Witch, who fought alongside Elcrest one thousand years prior to the main events of the story.

The Second Eclipse
A thousand years prior to the events of the main story, Millicent became the Wind Witch at some point during the period of the second Eclipse. She was met by Elcrest and was tuned by the Conductor, becoming his ally. Accompanying Elcrest with the four other witches, the Forgotten King Xeno, and Technolomy Veronica, the group would battle the Angels and ascend to the Moon in order to stop the Eclipse by defeating God. On that fateful day when the group would ascend the Yggdrasil and reach the Moon, Millicent would witness God, in reality the Mother Qualia, afflict Elcrest with a severe strain of negative energies. Xeno sacrifices himself to save Elcrest and, despite their reluctance in leaving him behind, the group is warped to safety by Hilda.

As the afflicted Elcrest suffered and begged his companions to kill him, Millicent would realize the concentration of negative emotions within him would also contaminate the world. When Francisca proposed she put him into a deep slumber within the waters as means of purification, the other Witches would agree with her plan and go their separate ways.

In the aftermath of the Eclipse, Millicent presumably returned to South Valley. Before she passed away, she would teach the people of the valley the melody of the Wind Score, her part of the Celestial Hymn. The song would be passed down for the next thousand years and would be a tune children would frequently whistle.

Chapter 10 - The Celestial Hymn
Millicent appears in Hilda's flashback, as she shows Alto the events that transpired a thousand years prior during the second Eclipse.

Her shadow appears in Alto's spirit world along with the other past Witches, where she expresses her inner doubts of defeating Mother Qualia.

When the Tuning Knights search for the dispersed scores of The Celestial Hymn, they visit Port Noir in order to locate the Wind Score. When they arrive, however, they realize they lack a solid lead on where to begin their search. When they overhear a young boy whistling a tune, the melody is recognized as the Wind Score by Veronica. Popo hums the tune to herself which causes a resonance in the wind and Millicent appears before Popo in a vision, her spirit having resided in the Wind Qualia the whole time. She commends Popo, whom she had been watching working tirelessly, and bestows her Wind Score to her successor. Millicent requests Popo protect Elcrest, to whom she now refers to as Alto, and states she can rest easy.