The Cairn Guardian emerged from the ancient stone cairns built by the first Guardians of the Loch centuries ago. As each generation of Guardians added stones to the cairns and performed protective rituals, the collective energy and intention imbued the stones with a mystical consciousness. During a time of great need, when the ancient evil first threatened to awaken, the Cairn Guardian manifested to aid the Guardians in their sacred duty.

The Cairn Guardian possesses a body composed of weathered stones bound together by glowing Celtic knotwork patterns. It can manipulate its stone form, reshaping and rearranging its components as needed. The Guardian emits a soft, ethereal glow that intensifies when danger is near. It has the ability to communicate through subtle vibrations and resonate with other stone structures in the area.

The Cairn Guardian serves as a mystical protector of ancient stone structures and sacred sites throughout the Highlands. It acts as an early warning system for the Guardians of the Loch, alerting them to disturbances in the natural and supernatural balance. The Guardian also reinforces protective wards and barriers around key locations.