They fade away because they are not remembered anymore.
StarClan cats fade away when they are forgotten or no longer have a significant connection to the living cats in their clan. As memories of them fade, their presence and power in StarClan diminish, eventually causing them to disappear.
When cats in StarClan are killed, they fade away or disappear from the afterlife. Unlike living cats who have nine lives, cats in StarClan do not possess the ability to be reborn after being killed.
They can not die again
If the cats are good even if they don't believe in StarClan they go to StarClan, but the cats like the cats from BloodClan don't. I'm not sure about the cats that have never heard of StarClan, but are good. Even if some cats believe in StarClan, but they do some really bad things, then they go to the "Place of No Stars".
Yes, StarClan is made up of former warriors, leaders, medicine cats, and other cats from the Clans who have passed away. They watch over the Clans and give them guidance and signs.
Most evil cats such as Tigerstar, Darkstripe, and Hawkfrost. Or cats that don't belive in StarClan.
In the warriors series, the cats that join Starclan are those who die and have followed the warrior code, and served their clan faithfully.
No, They cant.
Yes, they were from Starclan. They were trying to decide who will journy to the Sundrowned place.
In reality, no. But in the warrior book series, yes. Most clan cats do believe in StarClan, with the exception of a few cats, generally those born outside the Clan like Mothwing and Cloudtail.
In the Warriors series, StarClan cats are believed to go to a heavenly realm called StarClan when they die. StarClan is a place where the spirits of deceased Clan cats reside, guiding and watching over the living cats in the Clans.
In the Warriors series, StarClan communicates with medicine cats through signs such as dreams, visions, and natural phenomena like shooting stars or unusual behavior in nature. These signs guide the medicine cats in their duties of interpreting omens, providing guidance to their Clans, and seeking answers from StarClan.
The code is 7193024