Mileth features as a minor character in the Tweeny Witches franchise, operating under the command of Atelia, a member of the ruling Three Sages in the Witch Realm. She appears most prominently within the OVA spin-off, Tweeny Witches: The Adventures. In this series, Mileth participates in narrative segments alongside the character Miletis, engaging in lighthearted or comedic vignettes while following Atelia's directives. These segments present a tonal counterpoint to the main series' central conflicts. The available sources provide no extensive exploration of her background, specific personality traits, magical capabilities, or character evolution across official media. Mileth is identified as a magic user within the series' setting.