AI tools for characters
Tools that help you build believable characters: personality, backstory, arcs and a living character bible.
Novelcrafter Codex
The Codex is a story bible that tracks every mention of a character as you write. Its AI chat lets you interview a character to test voice, backstory and gaps. Bring your own AI model.
Source: maker's site, checked 16 Oct 2026
Sudowrite Story Bible characters
Character cards in Sudowrite's Story Bible shape how the AI writes each person's dialogue and choices. It can draft cards from your synopsis, but edit them hard so they sound like your people.
Source: maker's site, checked 16 Oct 2026
Campfire Writing
Character sheets, relationship maps and family trees on a flowchart board. Mainly a planning tool, not AI. Your first 10 characters are free.
Source: maker's site, checked 16 Oct 2026
ChatGPT
Good for talking through a character's psychology and asking how they would react under pressure. Treat its ideas as prompts, not facts about your book.
Source: maker's site, read 16 Oct 2026. Its site blocks auto link checks.
Claude
Good at reading a long character file and spotting where a reaction does not fit what you have set up. Useful for stress testing scenes.
Source: maker's site, read 16 Oct 2026. Its site blocks auto link checks.
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