Thunderstar

Thunder is a large orange tom with a broad head, who is described as the color of autumn leaves, with amber eyes and big white paws.

Secrets of the Clans

 * Thunder thought he should rule the forest, because he could fight and hunt the best in the undergrowth. He was said to be strong, courageous, and determined. After his fallen companions- the very first StarClan cats- talked to him and the other cats, though, he became the first leader of ThunderClan. He worked with the other four leaders, Wind, River, Shadow, and Sky, to develop the warrior code. It was said in Clan legend that Thunderstar was the leader who developed some of the warrior code's more compassionate elements.

Long Shadows

 * Thunder met with the other ancient leaders, Shadow, River and Wind to discuss the rogue Sol with Midnight. They, especially Shadow and Wind, show their hostility but Thunder continues to ask questions carefully, trying to avoid a fight.

Erin Hunter Chat

 * In an Erin Hunter Chat, Vicky revealed that Thunder, Shadow, River, Sky, and Wind did not take "-star" on the end of their names, because the tradition had not yet been established in their time.