In PRINCE2, the role specifically responsible for carrying out risk response actions is referred to as the 'risk actionee'. This role is assigned to an individual who is tasked with implementing the agreed upon actions to address specific risks. The risk owner, on the other hand, is responsible for the overall management of the risk.
References: PRINCE27 Foundation handbook and official documents.

A minimum requirement for applying the Quality theme is to use lessons learned to inform quality planning.
This ensures that insights gained from past projects or earlier phases of the current project are used to improve quality management practices throughout the project's lifecycle. References: PRINCE2 Foundation Training Manual; PRINCE2 2017 Foundation handbook.

User's quality expectations are documented in the 'Project Product Description.' This document defines what the project must deliver to meet the user's expectations, including the quality requirements and acceptance criteria for the final product, ensuring alignment with user needs and standards.
PRINCE2 7 Foundation documentation on quality management and project product descriptions.