Riverstar

River, or Riverstar, is a silver-gray tom with long fur and bright, wide green eyes.

Long Shadows

 * River meets with Shadow, Thunder, and Wind to discuss the loner, Sol, with the badger that helped saved the Clans from destruction, Midnight. River is described as if he was made of rain. River didn't want to come to the meeting in the first place, asking why they are here. He continues to complain about why they should be the ones to discuss the loner.

Secrets of the Clans

 * He is the founder and the first leader of RiverClan, working with Thunder, Wind, Shadow, and presumably Sky, who is not mentioned, to develop the Warrior Code. It is suggested that he is the cat who thinks up a mentoring program for training the apprentices. He is known to be generous and warm-hearted with his own Clan, but not interested in the other Clans' troubles, even skipping Gatherings when possible.

Code of the Clans

 * River is mentioned briefly, along with Thunder, Wind, Shadow, and Sky, after the great battle at the dawn of the Clans. The spirits of those killed in the battle compel the remaining cats to be at peace. He, along with the other four new leaders, vow to create their Clans and find ways to stop the fighting.

Trivia

 * 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.
 * This, however, contridicts information in Secrets of the Clans, which shows the founders of the Clans to have the "-star" suffix.