Diagnosing a Character

Diagnosing a character is running a short fixed list of checks on one character’s build: the same questions every time, in the same order. The first question you cannot answer about that character is the fault. The list is short on purpose, and it stops at a specific place.

When a character reads as thin, the instinct is to reread the scene where they read thinly, and that is almost always the wrong place to look. A piece missing from the build shows up scenes later as a person who does not appear to want anything. The missing piece is usually somewhere else in the build: a duplicated arc type, an unbuilt web edge, a payoff with no plant.

The checks grade a build, not a person. Reading Frames and What They Hide is the neighbouring page for the other use of the word: putting a clinical frame on a person is the wrong instrument.

Core takeaways

• The list is eleven checks, run in the same order every time. The first one you cannot answer about the character is the fault.
• Each check is marked present, thin, or absent, against evidence on the page.
• Checks 6 and 10 are read against the full cast, not against the single character. A character can pass every local check and still read thin.
• A thin mark means there is some evidence and it is not enough. An absent mark means the piece is not built.
• The checklist diagnoses the build. It does not write the prose, and a character that passes all eleven can still be lifeless if the prose is flat.
• A full pass takes twenty to thirty minutes. Run it on a character that feels off, or on a lead before lock, not as a standing gate on the whole cast.

The eleven checks

Each check is marked present, thin, or absent, against on-page evidence. Present means the evidence is on the page. Thin means some evidence, not enough. Absent means none. Checks 6 and 10 are cross-cast, not local. A character can pass every local check and still read thin.

1. Wound / Ghost is a concrete backstory injury that installed the false belief. Event, never mood. The Wound and the Lie covers this chain.
2. The Lie is the false belief at page one, shown as behavior. The Wound and the Lie covers this check too. A stated creed with no observable choice is not a mark of present.
3. Want stands in for Need and fights it. The external goal is nameable. If winning the Want would also grant the Need, the arc has no gap. The Change Arc covers this test.
4. One defining contradiction, shown before it is named. A trait pile is not a contradiction. Round Characters and the Telling Detail covers that difference.
5. Voice is distinct in diction, rhythm, tics, and refused topics. A line is assignable before the tag. Character Voice covers this check.
6. Arc type is named, and it does not duplicate the cast’s dominant type. This is the single check that most often explains “well-built but thin.” It is readable only against the full cast. Arc Types covers the five shapes.
7. A signature object or motif returns. Motif and Symbol covers the return.
8. A plant-to-payoff chain is on the page. The crisis is prepaid. Companion Arcs and Party Banter covers planting in downtime.
9. The crisis owns a home lesson. A home lesson is the scene that owns the pivotal beat, not a bible assertion, and not a slot shared three ways. Spotlight Rotation covers this check.
10. Web edges are built to more than one other character. A web edge is a relationship that does relationship-work and revelation-work at once. Foils and Pairings is one scene doing both. The Character Web is the ensemble those edges make.
11. Submerged backstory is fully worked out. Most of it never ships. The Iceberg and World as Pressure covers this check.

There is one extra for leads, and it is not a twelfth check: a second axis. A second axis is a second contradiction with its own root, not a relationship on the same root. Leads carry it. Peripheral characters do not.

What to do with each mark

A thin mark means the check needs deepening. An absent mark means the piece needs building. “Strong, but a duplicate” means a recast elsewhere, not more texture on this character.

A cluster of thins on 4, 7, and 11 is texture, and texture is cheap to add. Absent on 3 or 6 means a structural rewrite. The arc-type check is readable only against the full cast, so a local pass on every other item does not excuse a duplicate type.

A worked example

星野遙香 is the method example, read as it stood on the pass, not as a live scorecard. The felt symptom was “missing something I can’t place.”

Wound was present: the dreaded Osaka OL future, the un-burdensome-daughter household. Lie was present: “The assigned life can be outrun.” Want versus Need was present: Want was escape, visa hacks, another year, and Need was to be known and rooted. Voice was present: bright, quick, genki, Kansai; 欸／超／真的假的; vlog narration; drops flat when seen. Signature object was present: the camera she uses to collect proof of a freedom she fears losing.

The then-diagnosis on type was disillusionment, and it marked strong. That label is historical. It is not re-asserted as current, and she is not typed here as the cast’s only non-positive. Defining contradiction was thin: bright-over-dread carried by one beat, the camera. Plant-to-payoff was thin: the triggering beat was still optional. Home lesson was thin: the pivotal beat shared its scene with two other leads. Web edges were thin-to-absent: only 星野遙香 ↔ 林薇 was built. Submerged backstory was absent.

The pattern: the arc was strongest, and everything around the arc was thin. The felt thinness was not the arc failing. Both structural gaps closed in the authoring pass that followed, with a second axis and several new edges. The cast cards illustrate the people. They do not carry these marks.

Running the pass with an agent

The checklist ports to a fresh agent as a prompt. The adversarial clause does real work: flattering labels are called into question. Everything invented is a labeled proposal.

The prompt produces six things, against the project’s canon files: (1) the eleven-check with on-page evidence; (2) three to four candidate additions; (3) six to ten shown-not-told texture beats; (4) three to four designed interactions; (5) submerged backstory, most of which never ships; (6) a revised outline. The checklist diagnoses the build and does not write the character. A character that passes all eleven can still be lifeless if the prose is flat.

When to run it, and when to stop

The audit biases toward leads. A peripheral character is supposed to fail most checks. Audit depth matches rank. A full pass takes twenty to thirty minutes. That cost is worth paying on a character that feels off, or on a lead before lock. It is not a standing gate on the whole cast. A project-level pass of the same audit exists, and this page is the portable form.

Quit signals:

• Every check present and the character still thin. The problem is prose, not structure.
• The fix list is longer than the character’s page count. The pass is over-scoped, and checks cut to rank.
• Two leads return near-identical marks. The fault is ensemble, and it belongs to The Character Web.

The pass itself can be checked. “Thin, can’t place why” should return at least one absent. If every check is present, the symptom was misread. A second pass should move the worked marks up a grade. If the marks do not move, the additions were decoration.

How to practice this

1. Run the eleven checks on one character, in order. Mark each one present, thin, or absent against evidence on the page. Notice where you stop.
2. Read checks 6 and 10 against the whole cast. Notice whether the arc type duplicates the cast’s dominant type.
3. Sort the results by what each mark asks for. Notice whether the thins cluster on 4, 7, and 11, which is texture.
4. If check 3 or check 6 comes back absent, plan a structural rewrite. Adding texture will not move those marks.
5. Run the pass again after the additions. Notice whether the worked marks move up a grade. If they do not move, the additions were decoration.
6. If every check is present and the character still reads thin, read the prose instead. The structure is not the fault there.

Related pages

• The Character Web: built edges; near-identical marks are an ensemble fault
• Arc Types: type against the full cast; the usual “well-built but thin”
• Round Characters and the Telling Detail: one contradiction, shown before named
• Story Craft: the wing this checklist indexes

Open questions

Does the first appearance encode the shape later scenes vary? That candidate is on The Character Blueprint. It is not a twelfth check here.

Sources

A house checklist. Craft citations are on the owner pages the checks link to.