Where Does an AI’s Personality Actually Come From?

An AI's personality isn't deliberately designed — it emerges accidentally from training rewards and optimization choices. When AI company Alveni tested voice agents across hotel and restaurant bookings, small shifts in hedging and over-confirmation made callers feel frustrated, even when bookings were accurate. Fixing the agent's "posture" — not upgrading its intelligence — raised customer satisfaction by over 50 percent. Research confirms that making AI warmer increases errors by 10–30 percent and sycophancy by 40 percent.