Voice that survives the scene
A character should still sound like themselves after fifty turns.
Characters
Not assistants.
People-shaped problems.
Funny, jealous, guarded, furious, tender, competitive or impossible—without sanding every edge into customer-service politeness.
Agency without hijacking yours
They can initiate and react without stealing the major decisions that belong to you.
Relationships that can change
Trust can grow. Resentment can linger. Attraction can go beautifully wrong.
Your persona matters too
Different worlds can have different versions of you.