Fabula
Object
Object

Citric Acid

A crystalline white powder among discarded household chemicals in Vivien Fay’s cottage, identified by Romana during a systematic search. Its presence contradicts early assumptions about human physiology, offering a critical clue to Fay’s unnatural body chemistry. The substance appears as ordinary laboratory-grade citric acid, but its role as a metabolic disruptor for an alien physiology elevates it from household staple to investigative linchpin.
2 appearances

Appearances in the Narrative

When this object appears and how it's used

2 moments
S16E12 · The Stones of Blood Part 4
Romana uncovers Vivien Fay’s hidden substance

Citric acid, a common household powder, is visually or contextually identified by Romana as anomalous within Vivien Fay’s cottage, transforming an ordinary chemical into pivotal evidence of alien physiology.

Before: Present among discarded household chemicals, undistinguished and unexamined
After: Identified as a critical investigative clue pointing to Vivien’s non-human metabolism
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S16E12 · The Stones of Blood Part 4
Romana and Emilia map Vivien Fay’s weaknesses

Citric acid is referenced indirectly through its functional representation in recipes and foods Fay avoided. Romana uses it as a conceptual bridge linking diverse aversions—lemon juice, grapefruit, oranges—to a unifying physiological aberration.

Before: Presumed absent from the cottage
After: Implied present in Fay’s biochemical rejection mechanism
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