Sunstar is introduced as Sunfall, the deputy of ThunderClan.
After Stonepelt retires, Sunfall is Bluepaw's new mentor.
After Pinestar left to become a kittypet, Sunfall becomes Sunstar.
He makes Tawnyspots his deputy.
After Tawnyspots retires to sickness, Sunstar has two options for the new deputy: Thistleclaw or Bluefur.
He is later killed by a loose dog.
His father and mother are unknown, but his brother is Featherwhisker.
When he went to the moonstone to get his nine lives but he is only given eight because Pinestar handed over his leadership when he had one life left.