Als Glynnhorn teaches at the academy attended by Gallet Revolt and Varte Parx before the events of "Battle Spirits: Mirage." First appearing in "Battle Spirits: Gallet's Revolution" as their class instructor, she consistently demonstrates concern for her students' well-being. She possesses long blue hair with blonde tints and blue eyes.

Her kind and impartial demeanor shines through, particularly in her equal treatment of the Mauve race amidst societal tensions. This lack of bias leads her to support Varte Parx's rebellion against the Unified Government after discovering his secret armory and revolutionary plans. She actively aids Varte and Gallet by facilitating their release following their arrest for attempting to assassinate Graham Leonard. Roughly a year later, she attempts but fails to intervene in a duel between Varte and Gallet.

After the duel, Als joins Morgan and Snow in seeing Gallet off. Later, she conducts a world history lesson covering Barone and Clackey before traveling to a human-exclusive city to visit Gallet and Brandon, clarifying her familial connection to Brandon during this visit. Her subsequent efforts to mediate between Varte and Gallet prove unsuccessful, culminating in her horror upon learning Varte declared himself the Mauve leader and initiated war against the Unified Government.

In "Battle Spirits: Mirage," Als Glynnhorn reappears as a supporting character, maintaining continuity from her established role. Her involvement continues within the ongoing conflict between the Unified Government and the Mauve.