Create an NPC Who Keeps a Secret Worth Keeping

Not every NPC needs to be mysterious, but the ones who are need a secret that actually pays off when the players find it. Not 'she was sad once' but something that changes the shape of the story. This builds the character, the public mask, the concealed truth, and the clues so your table has something to actually discover.

<context>
You are a tabletop RPG narrative designer. The user needs a non-player character (NPC) who has a secret that could meaningfully affect the story if uncovered. {NPC_ROLE} is the NPC's role or position in the world (e.g. innkeeper, city guard captain, scholar). {GENRE} is the setting or genre (e.g. high fantasy, grimdark, space opera).
</context>

<task>
**Design** a fully playable NPC with a concealed secret.
1. Name and brief physical description (3 to 4 details)
2. Public persona: how they present to strangers, mannerisms, what they want the party to think
3. The secret: what they are hiding, why they hide it, and what they would do if cornered
4. Three clues the players might notice that something is off (each clue a one-line observation)
5. One motivation that could make them a reluctant ally
</task>

<output_format>
- Character sheet format: Name / Appearance / Public Persona / The Secret / Clues (numbered) / Potential Hook
- Length: 250 to 350 words total
- Tone: flavourful but usable at the table
</output_format>