Guststar is a brown tabby with darker brown stripes. She has greenish brown eyes and white around the muzzle. She is medium sized, and is a shorthair. Her whiskers are all white and she has a maroon/brown colored nose. Stripes run away from her eyes like brown tears.

Guststar is a mild temperment cat, although when she gets mad, she gets really mad. She is curious, like most cats and is a strong leader. Fighting is not her favorite way to solve problems, but if there is a need, Guststar can fight for what she believes in. Her method of discipline is strict and apprentices who fail to follow the Warrior Code, beware. She holds her title with dignity but doesn't brag. When others ask dumb questions, Guststar answers with sarcasm.

Gustkit was born to Songstar, the previous leader of Riverclan and Solarbeam, a warrior of Riverclan. Songstar had a litter of 4 kits; 3 toms and one she cat. Only Gustkit and her brother Emberkit survived.

Gustkit was apprenticed at the same time as her sibling, but she got her warrior name a couple of moon highs before he did. This was because of a border dispute that occured. Her brother was at the camp, and she happened to be on patrol. In that battle, the deputy was killed. A tom named Darkheart was chosen as the new deputy, but he gave it to Gustfeather. Songstar was on her last life, when green cough spread like wildfire throughout the camp. The medicine cat did all she could, but it was time. On her last breath, the leader gave up her title to her daughter.