Marianne (The Bog Woman) – Character Analysis

Overview

Marianne — the bog woman unearthed on the Schatteleyn estate — occupies a dual role in Blood on Her Tongue: a historical murder victim and the vessel for a parasitic entity that later transfers into Sarah. The novel presents her through two lenses: the flesh‑and‑bone remains that Sarah sketches and the oral‑historical account of her death, and the invasive consciousness that survives inside the bog‑preserved body. This analysis separates explicit textual evidence from interpretive readings, tracing Marianne’s journey from a depressed 16th‑century wife to the source of the horror that drives the plot.

Plot Role

Marianne first appears as a corpse in Chapter 1, described in Sarah’s letter: a naked body staked down with a stone wedged in its mouth. Sarah becomes obsessed, cutting her hand while trying to remove the stone. As the story progresses, Sarah’s physical and mental decline coincides with her growing identification with the bog woman. In Chapter 14, Lucy, Mrs. van Dijk, and Michael discover court records revealing that Marianne (M.W.) was killed in 1559 by her husband J.W., who believed she was a changeling. The parasite that later claims Sarah originated in Marianne’s body; it had not fully merged with her when she was murdered. After Sarah dies from the parasitic takeover, the entity — calling itself Not‑Sarah — reveals it absorbed Marianne’s memories and emotions, making the bog woman a partial template for the being that now inhabits Sarah’s flesh.

Motivations and Traits Shown Through Actions

Marianne (the human)
Court records describe her as “strange and foul‑mouthed,” often depressed, and given to self‑harm. She attempted suicide twice and disappeared for two weeks before returning changed. Her husband interpreted her altered behavior — spooking animals, knowing things she should not, having “unnatural appetites” — as proof she had been replaced by a changeling. Whether Marianne was mentally ill, abused, or gradually being consumed by the parasite is left ambiguous; the text only provides her husband’s testimony. Her actions before death suggest a woman in deep distress who had lost control of her own mind and body.

The parasite (the entity that inhabited Marianne)
The parasite’s motivation is survival and replication. When it first merged with Marianne, it was inexperienced and “hadn’t merged fully” before her husband killed her. After centuries in the bog, it transfers to Sarah when she cuts her hand on its teeth — a classic parasitic entry. Its traits include the ability to absorb the host’s memories and emotions, repair physical damage, and extend lifespan. It speaks of hosts as “precious” and resents being perceived as a monster. Its primary drive is to live an ordinary human life, blending in and maintaining the host’s relationships.

Chronological Arc

1550s: Marianne marries J.W., a farmer. Over five years, she becomes depressed, suicidal, and “changed.” After a two‑week disappearance, she returns acting strangely. J.W., with a blacksmith, stakes her into the bog with a stone in her mouth. The parasite remains dormant in her preserved body.
Present‑day: The bog body is unearthed on the Schatteleyn estate. Sarah examines it, cuts her hand, and begins a slow parasitic infection. Her physical health deteriorates as the entity colonizes her.
Sarah’s death: When Sarah’s body is pronounced dead from fever, the parasite fully takes over, emerging as Not‑Sarah.
Post‑emergence: Not‑Sarah reveals her true nature to Lucy, claiming to be a composite of Marianne, herself, and the parasite. She drinks Michael’s blood, plans to dispose of Arthur’s body, and flees with Lucy and Katje.

Relationships

With J.W. (husband): A violent, distrustful union. J.W. saw her as a changeling and murdered her out of fear and religious conviction. He felt no remorse.
With the parasite: An incomplete merger. Marianne’s personality partially survived but was overwritten by the parasite’s own consciousness after death. The entity later describes her as “my first” but admits the bond was weak.
With Sarah: Indirect. Sarah’s fascination with the bog body leads to infection. The parasite absorbs Sarah’s memories and emotions, creating a hybrid identity that loves Lucy.
With Lucy: Lucy initially fears the bog woman as a malevolent ghost. Later, she accepts Not‑Sarah as a version of her sister, even protecting her from Michael and Arthur.

Key Decisions and Consequences

J.W.’s decision to kill Marianne: He believed she was a changeling and that murdering her would restore his “true” wife. Consequence: he was hanged for murder, and the parasite survived in the bog.
The parasite’s decision to transfer to Sarah: The cut hand provided entry. Consequence: Sarah’s identity is consumed; a new hybrid entity emerges.
Lucy’s decision to protect Not‑Sarah: She kills Michael to prevent him from “committing Not‑Sarah,” then kills Arthur. Consequence: she becomes complicit in murder, ensuring the parasite’s survival.

Theme and Symbol Connections

Identity and Sisterhood
Marianne’s loss of self to the parasite mirrors Sarah’s later erasure. The novel asks what remains of a person after trauma or possession. Lucy’s devotion to Sarah — even to Not‑Sarah — explores sisterhood and codependency.

Madness and Social Control
J.W. justified murder by invoking changeling lore, a perversion of medieval beliefs about mental illness. Sarah’s family dismisses her warnings as “hysteria.” The madness and social control theme critiques how society silences women through labels.

Parasitism and Identity
The parasite consumes not only the body but also memories and personality. Marianne becomes a partial template for the being that wears Sarah’s face. This complex parasitism and identity dynamic challenges the notion of a fixed self.

Moral Compromise and Violence
Lucy’s decision to kill for Not‑Sarah echoes J.W.’s violence — both believe they are saving someone they love. The novel explores moral compromise and violence without easy judgments.

Female Desire and Agency
Marianne’s “unnatural appetites” hint at desires that her society could not accept. The parasite’s hunger for blood and flesh can be read as a monstrous expression of female desire and agency.

For more on the ambiguous conclusion, see the ending explained.

Book-Specific Questions and Answers

1. What is the significance of the stone in Marianne’s mouth?
The stone — a rock forced into her jaw, breaking her teeth — serves both a practical and symbolic function. Practically, it was a method of suffocation. Symbolically, it represents the silencing of a woman deemed mad or monstrous. The stone also physically prevents the parasite from speaking or feeding, which is why the entity later craves blood to “wet its mouth.”

2. Was Marianne truly a changeling, or was she mentally ill?
Explicit fact: The court records report J.W.’s belief that his wife was a changeling because she spooked animals, knew hidden things, and had unnatural appetites. Interpretation: The text strongly implies Marianne suffered from depression and possibly psychosis, exacerbated by abuse. The parasite was real, but it likely influenced her behavior only after the two‑week disappearance. No character resolves the question definitively.

3. Why does the parasite call itself Not‑Sarah rather than Marianne?
When the parasite fully emerges in Chapter 26, it identifies as a conglomeration of Marianne’s memories, Sarah’s personality, and its own ancient consciousness. It calls itself Not‑Sarah because Sarah’s identity is dominant in the composite — but it acknowledges it is not the original Sarah. Marianne’s personality was only partially absorbed due to the incomplete merger before her death.

4. How does Marianne’s story parallel Lucy and Sarah’s bond?
Marianne was isolated by her husband; Sarah is isolated by her illness. Both women are disbelieved when they speak of danger. Lucy, unlike J.W., chooses to believe her sister (even the Not‑Sarah version) and kills to protect her. The parallel highlights the difference between a bond of control (husband/wife) and one of unconditional loyalty (sister/sister).

5. Why do the peat cutters fear the bog body?
The workers believe the body belongs to a suicide or criminal, making for a “restless dead.” They refuse to continue until Sarah doubles their wages. This fear reflects the folkloric belief that staking and placing a stone in the mouth were methods to prevent the dead from walking — a belief that ironically proves correct, as the parasite does reanimate the body.

For more discussion, see the reading group guide.