Martha is an elderly woman who lives in the village where Anne resides in the anime Maria the Virgin Witch. She appears to be in frail health and requires ongoing care, and her condition worsens over the course of the story, causing distress for the main character Maria and those around her. Martha's background is not extensively detailed, but she is presented as a senior member of the village community, likely a grandmother figure. Her personality is not deeply explored; she is shown primarily through her vulnerability and her dependence on the kindness of others. Her motivation is not explicitly stated, but she appears to rely on Maria's goodwill and the care provided by the villagers to cope with her illness.

Martha's role in the story is largely as a catalyst for Maria's compassionate actions. When Martha falls ill, Maria uses her magical abilities to create special medicines, which she freely provides to care for Martha and others in need. This act highlights Maria's generous nature and her desire to protect the innocent. The worsening of Martha's condition also serves as a source of emotional weight, particularly when Maria returns home after a battle and finds that Martha's health has declined further.

Key relationships include Martha's bond with Maria, who provides her with healing remedies, and with Anne and the other villagers who look after her. Martha does not undergo significant personal development; she remains a frail, elderly figure throughout the series. She possesses no notable abilities or magical powers, as she is an ordinary human without any special traits. Her presence primarily underscores the human cost of the ongoing conflict and reinforces Maria's motivation to intervene in the war.