the name is not in the series
The first cat to enter StarClan from the four original Clans in the Warriors series was Bluestar. She was a noble leader of ThunderClan who sacrificed herself for her Clan, and her spirit was welcomed into StarClan after her death.
Thunderclan, Shadowclan, Windclan, Riverclan, Skyclan, Starclan
The four cat clans in series one of Warrior Cats are ThunderClan, ShadowClan, WindClan, and RiverClan. ThunderClan is known for its bravery and loyalty, ShadowClan for its cunningness, WindClan for its speed and agility, and RiverClan for its swimming skills and connection to water.
First of all they're called CLANS and secondly there are 5/6 (in order of my favorite) Riverclan,shadowclan,thunderclan,windclan,skyclan,and there heaven starclan...
Cloudtail didn't believe in StarClan because he was raised as a kittypet and did not grow up with the traditional beliefs of the Clans. He was initially skeptical of the idea of ancestors looking over them from the stars, as it was a concept foreign to him. Over time, he developed his own beliefs and connection with StarClan.
I don't know because that was a LONG LONG time ago.
the first clan cats came from the tribe of rushing water, but there names were thunderstar riverstar shadowstar windstar skystar. they were the first becuase the startded the five clans: thunderclan riverclan skyclan (although skyclan did not live beside the other clans until around the book squirrelflights hope) shadowclan windclan. the cats were also the leaders of the clans. the clans were named after the great leaders. thunderstar - thunder clan. they were the first cats to die then go to starclan. wich they made because the started the sixth clan - starclan. you could say they were the great creators letting land for all the present clan cats. like firestar legendary leader of thunderclan. but now is bramblestar.
Snowkit is not in StarClan because he died as a kit before he could fully experience life and develop a warrior name. In the warrior code, a cat must have served their Clan as a warrior to enter StarClan, and Snowkit did not have the opportunity to do so before his death.
On the way to StarClan, cats may experience a sense of peace and guidance. They might feel a connection with their ancestors and the spirits of departed warriors. The journey is described as a peaceful passing to the afterlife where they will find rest and happiness.
Medicine cat apprentices go to the Moonstone to receive their full medicine cat powers and to connect with StarClan for guidance and wisdom. It is a sacred place where they communicate with their ancestors and receive visions.
Medicine cats should know how to interpret signs and omens from StarClan, communicate with their ancestors through dreams or visions, and seek guidance on healing herbs and remedies to help their clan. It's also important for them to establish a strong spiritual connection with StarClan to receive wisdom and advice in times of need.
According to the book Secrets of the Clans, ThunderClan's original (first) medicine cat was Cloudspots.
The earliest WinClan medicine cat mentioned was Mothflight. She was the very first medicine cat, the one who discovered the Moonstone and brought the knowledge of it back to the clans.