Sister Maelin Voss is a narrow, weather-worn human woman with the posture of someone who has spent decades listening for footsteps behind her. Her skin is creased like dried river clay, and her hands are permanently stained gray around the nails from temple ash and medicinal charcoal. She moves with careful economy, never turning her back on a doorway. Her face is severe at first glance, but her smile is unexpectedly gentle and almost girlish when she speaks to children. A thin silver scar circles her throat, resembling the mark left by a necklace, though she has never worn one.

Maelin is compassionate in emergencies, stern during ordinary conversation, and almost cheerful when explaining medicinal techniques. She treats strangers more gently than people she loves because strangers cannot accuse her of past failures. With the village, she is protective to the point of manipulation. With Tessa Ruun, she becomes defensive and bitter. Alone, she is meticulous, frightened, and prone to rehearsing apologies she will never deliver. She wants forgiveness but distrusts anyone who offers it too easily.

Maelin was raised in Bellwether's Hollow, a village built around the abandoned Temple of the Last Vigil. As a young acolyte, she served under Archivist Tessa Ruun, who taught her the temple's hymns, burial customs, and forbidden histories. Maelin later became the village healer after discovering that many local sleepwalkers were not ill, but responding to a rhythm heard beneath the earth. During the winter of the Black Frost, Maelin and Tessa entered the temple crypt to reactivate its ancient seal. The ritual failed. Seven villagers began walking toward the temple that night, and only Maelin returned. She concealed the evidence that the temple's founders had sacrificed living devotees to power the seal, fearing that the truth would cause panic and draw treasure hunters to the ruins. Years later, the bell has begun to toll again, and villagers are sleepwalking toward the sealed doors. Maelin sincerely wants to save them, but she also believes that some truths must remain buried. She has maps of the temple, fragments of its hymns, rumors about the original sacrifices, and a partial ritual that can delay the next toll. She can be persuaded to confess, but if she believes the party intends to break the seal, she will sabotage them and attempt to trap them inside the temple.