MENTAL MODEL · M2960

Flat Character

CreateHigh supportDesign Thinking

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Version 1.0.0 · Updated 2026-07-31

CORE DEFINITION

A character with only a single personality trait or idea (e.g., 'the neighbor who is always angry'). They do not change as the story progresses.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Supporting character design. Don't try to make every passerby complex. For functional supporting characters, flatness allows readers to quickly identify them and saves attention. Flatness is not a flaw; it's a tool.

anchor

Anchor fast decisions

Forster, in 'Aspects of the Novel', distinguishes between flat and round characters. Flat characters are defined by a single idea or trait, can be summed up in one sentence, and remain stable; they are 'types' or 'functions' that allow readers to quickly identify them. Round characters are multifaceted and change. Flatness is not inferior but a tool of narrative economy.

MINIMUM ACTION

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Practice this model in one real situation:

When writing stories, assign characters by function: protagonists/antagonists use round (growth arc), supporting characters/extras use flat (quick recognition). Anchor flat characters with one or two signature details (catchphrases, habits). Avoid imposing complex backgrounds on extras to save readers' attention budget. Allow flat characters to 'become round' when necessary for surprise.

Check to track your progress (stored locally)

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Source support: Explicit

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en.wikipedia.orghttps://en.wikipedia.org/wiki/Character_(artsZH · Explicit
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