Rock is a bull (male elephant) who was a member of Thunder's herd.
Rock is a large bull (male elephant) with big tusks and grey skin with emerald-green eyes.
While Sky, Silverhorn, and Moon were attacked by lions, Sky cried for help. Rock heard her cry and was able to defend them but failed to save Moon. After Moon's passing, they continued following the vulture.
=== Blood and Bone ===
- Rock's emerald green eyes could be a reference to Pokemon Emerald, one of the inspirations of the Bravelands series.