Rurl

Rurl is a seal that befriends Rannoch. He carries Rannoch to the island where Sgorr's secret is buried.

History
Rurl first met Rannoch when the deer came to a beach looking for seaweed to help an otter's sick mate. The two spent the next three days getting to know each other until Rannoch had to leave with the seaweed as promised to the otter, but expressed hopes of meeting Rurl again.

The two animals meet again when Rannoch goes out to find out Sgorr's secret after Bracken is killed by one of his assassins. Rannoch tries to swim out to the island where Sgorr's secret is buried and nearly drowns because of the stormy sea and his thick coat. Rurl arrives and, with help from other seals, carries Rannoch to the island, where they rest and recover. They find an abandoned house and a large pile of rocks, which they dig up. Under the rocks they find a grave and, to the horror of both animals, the remains of a human infant that Sgorr had killed.

Years after Sgorr's defeat, it is revealed that Rurl was killed by a Viking spear out of getting too close to a battle on the beach where he was resting.